Hi Group, can someone help please. I have a VIZIO Model # M550SV 55" random ly shuts off/on.. I checked the voltages on power supply board all are corr ect.. after doing research online, there seems to be a firmware problem. i hooked up to their website, couldn't find any updates.. is there a fix to t his TV, ???
Have you checked for interference (led lights, TL lights, etc), If they produce interference with your remote control, thats bad.
Old story : a tv with sonic remote control. Lots of failures,an visits to the shop.
Turned out to be from a parrot, he could hear the sonic control, and started to imitate the ultra sound.(He hated tv).
omly shuts off/on.. I checked the voltages on power supply board all are co rrect.. after doing research online, there seems to be a firmware problem. i hooked up to their website, couldn't find any updates.. is there a fix to this TV, ???
That series is known for bad main boards that show all sorts of symptoms. No new ones are available, and used ones may put you in the same boat in a few months. Even when Vizio sells them, they are "recertified", which mean s they tested them to see if they work for 5 minutes and box them for sale. We've reflowed the BGA chip with inconsistent results but no longer take those in for service.
That TV can update its firmware when connected on-line, but it doesn't seem Vizio ever released a later version of the firmware it was shipped with.
ndomly shuts off/on.. I checked the voltages on power supply board all are correct.. after doing research online, there seems to be a firmware problem . i hooked up to their website, couldn't find any updates.. is there a fix to this TV, ???
No new ones are available, and used ones may put you in the same boat in a few months. Even when Vizio sells them, they are "recertified", which mean s they tested them to see if they work for 5 minutes and box them for sale. We've reflowed the BGA chip with inconsistent results but no longer take t hose in for service.
em Vizio ever released a later version of the firmware it was shipped with.
is there a board number locater for this BGA chip, ??? I have a hot air sol dering gun, im gonna try to reflow it. would 350 degree's for 2-3 minutes s uffice???
randomly shuts off/on.. I checked the voltages on power supply board all ar e correct.. after doing research online, there seems to be a firmware probl em. i hooked up to their website, couldn't find any updates.. is there a fi x to this TV, ???
s. No new ones are available, and used ones may put you in the same boat in a few months. Even when Vizio sells them, they are "recertified", which me ans they tested them to see if they work for 5 minutes and box them for sal e. We've reflowed the BGA chip with inconsistent results but no longer take those in for service.
seem Vizio ever released a later version of the firmware it was shipped wit h.
oldering gun, im gonna try to reflow it. would 350 degree's for 2-3 minutes suffice???
It's the one under the silver heatsink. Remove the heatsink carefully bec ause the sink will be stuck to the BGA. If you rip the BGA off the board, it's junk.
We've tried several profiles but they're hit or miss. Ideally it should be reballed or the chip outright replaced. Because of the drop in price for a new TV, we've stopped servicing this model.
I would go less on the temp, maybe 325C for 3 minutes tops. If it works, c onsidering opening a hole in the back cover and adding a slow moving fan.
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:" randomly shuts off/on.. I checked the voltages on power supply board all are correct.. after doing research online, there seems to be a firmware pro blem. i hooked up to their website, couldn't find any updates.. is there a fix to this TV, ???
oms. No new ones are available, and used ones may put you in the same boat in a few months. Even when Vizio sells them, they are "recertified", which means they tested them to see if they work for 5 minutes and box them for s ale. We've reflowed the BGA chip with inconsistent results but no longer ta ke those in for service.
t seem Vizio ever released a later version of the firmware it was shipped w ith.
soldering gun, im gonna try to reflow it. would 350 degree's for 2-3 minut es suffice???
ause the sink will be stuck to the BGA. If you rip the BGA off the board, i t's junk.
e reballed or the chip outright replaced. Because of the drop in price for a new TV, we've stopped servicing this model.
considering opening a hole in the back cover and adding a slow moving fan.
after taking the over off, and visually inspecting the boards. I found five bulging caps 220uf, 25v all the same. on the main board. ordered new ones, will post if successful..
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55" randomly shuts off/on.. I checked the voltages on power supply board al l are correct.. after doing research online, there seems to be a firmware p roblem. i hooked up to their website, couldn't find any updates.. is there a fix to this TV, ???ptoms. No new ones are available, and used ones may put you in the same boa t in a few months. Even when Vizio sells them, they are "recertified", whic h means they tested them to see if they work for 5 minutes and box them for sale. We've reflowed the BGA chip with inconsistent results but no longer take those in for service.
n't seem Vizio ever released a later version of the firmware it was shipped with.
ir soldering gun, im gonna try to reflow it. would 350 degree's for 2-3 min utes suffice???
ecause the sink will be stuck to the BGA. If you rip the BGA off the board, it's junk.
be reballed or the chip outright replaced. Because of the drop in price fo r a new TV, we've stopped servicing this model.
, considering opening a hole in the back cover and adding a slow moving fan .
ve bulging caps 220uf, 25v all the same. on the main board. ordered new one s, will post if successful..
I replace the bad caps, not successful, still got the vizio logo frozen on screen, then i tried to heat up the BGA chip, now the set is dead..??? no l ogo, no back lights.
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V 55" randomly shuts off/on.. I checked the voltages on power supply board all are correct.. after doing research online, there seems to be a firmware problem. i hooked up to their website, couldn't find any updates.. is ther e a fix to this TV, ???
ymptoms. No new ones are available, and used ones may put you in the same b oat in a few months. Even when Vizio sells them, they are "recertified", wh ich means they tested them to see if they work for 5 minutes and box them f or sale. We've reflowed the BGA chip with inconsistent results but no longe r take those in for service.
esn't seem Vizio ever released a later version of the firmware it was shipp ed with.
air soldering gun, im gonna try to reflow it. would 350 degree's for 2-3 m inutes suffice???
because the sink will be stuck to the BGA. If you rip the BGA off the boar d, it's junk.
ld be reballed or the chip outright replaced. Because of the drop in price for a new TV, we've stopped servicing this model.
ks, considering opening a hole in the back cover and adding a slow moving f an.
five bulging caps 220uf, 25v all the same. on the main board. ordered new o nes, will post if successful..
n screen, then i tried to heat up the BGA chip, now the set is dead..??? no logo, no back lights.
Reflowing is a bit of an art. You need to get the chip hot enough to reflo w the crappy lead free solder that is brittle and flows at a higher tempera ture than tin/lead that they use these days, but that much heat is close to where the chip dies... temperature over time. You also need to be sure y ou don't warp the board under the chip while you're doing this.
*BUT*(!), you said in your first post you were getting a random shutoff con dition, and now you said it was getting stuck on the Vizio logo on the scre en. That's a different issue altogether, although it's probably too late n ow because you might have torched the BGA.The M550SV not starting at all or getting stuck on the boot logo is general ly a corrupted NAND chip on the back side of the board. It's a 48 pin surf ace mount TSOP1 flash (the only one on that board) and isn't easy to change if you don't have surface mount soldering experience. I used to change th em when the TVs were pretty new until the BGAs started acting up as the TVs got older and built up miles.
Check your connections. If you can get it back to the stuck logo, you can order one of these already programmed from a guy in Texas - I think it's Co ppell TV or something close, and change it if you can solder tight pitch sm d stuff. If not, keep trolling ebay for a cheap one.
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ote:
0SV 55" randomly shuts off/on.. I checked the voltages on power supply boar d all are correct.. after doing research online, there seems to be a firmwa re problem. i hooked up to their website, couldn't find any updates.. is th ere a fix to this TV, ???symptoms. No new ones are available, and used ones may put you in the same boat in a few months. Even when Vizio sells them, they are "recertified", which means they tested them to see if they work for 5 minutes and box them for sale. We've reflowed the BGA chip with inconsistent results but no lon ger take those in for service.
doesn't seem Vizio ever released a later version of the firmware it was shi pped with.
ot air soldering gun, im gonna try to reflow it. would 350 degree's for 2-3 minutes suffice???
ly because the sink will be stuck to the BGA. If you rip the BGA off the bo ard, it's junk.
ould be reballed or the chip outright replaced. Because of the drop in pric e for a new TV, we've stopped servicing this model.
orks, considering opening a hole in the back cover and adding a slow moving fan.
d five bulging caps 220uf, 25v all the same. on the main board. ordered new ones, will post if successful..
on screen, then i tried to heat up the BGA chip, now the set is dead..??? no logo, no back lights.
ow the crappy lead free solder that is brittle and flows at a higher temper ature than tin/lead that they use these days, but that much heat is close t o where the chip dies... temperature over time. You also need to be sure yo u don't warp the board under the chip while you're doing this.
ondition, and now you said it was getting stuck on the Vizio logo on the sc reen. That's a different issue altogether, although it's probably too late now because you might have torched the BGA.
ally a corrupted NAND chip on the back side of the board. It's a 48 pin sur face mount TSOP1 flash (the only one on that board) and isn't easy to chang e if you don't have surface mount soldering experience. I used to change th em when the TVs were pretty new until the BGAs started acting up as the TVs got older and built up miles.
order one of these already programmed from a guy in Texas - I think it's C oppell TV or something close, and change it if you can solder tight pitch s md stuff. If not, keep trolling ebay for a cheap one.
after reheating the BGA chip, i checked the power supply board. and I'm get ting zero volts going to the main board on all pins. looks like a short, ch ecked all connections. maybe i could have melted the solder under the chip when reheating and created a short???
On Wednesday, November 18, 2020 at 5:53:26 PM UTC-5, snipped-for-privacy@gmail.com w rote:
flow the crappy lead free solder that is brittle and flows at a higher temp erature than tin/lead that they use these days, but that much heat is close to where the chip dies... temperature over time. You also need to be sure you don't warp the board under the chip while you're doing this.
condition, and now you said it was getting stuck on the Vizio logo on the screen. That's a different issue altogether, although it's probably too lat e now because you might have torched the BGA.
erally a corrupted NAND chip on the back side of the board. It's a 48 pin s urface mount TSOP1 flash (the only one on that board) and isn't easy to cha nge if you don't have surface mount soldering experience. I used to change them when the TVs were pretty new until the BGAs started acting up as the T Vs got older and built up miles.
an order one of these already programmed from a guy in Texas - I think it's Coppell TV or something close, and change it if you can solder tight pitch smd stuff. If not, keep trolling ebay for a cheap one.
etting zero volts going to the main board on all pins. looks like a short, checked all connections. maybe i could have melted the solder under the chi p when reheating and created a short???
The power supply when unplugged from the main will output at least one volt age al the time. With just AC applied, check for a standby 5 or 12V (or wh atever this uses - could be either). If you see the standby voltage, plug in the main and recheck. If that voltage goes away, something is loading i t down on the main. Since the BGA is not powered directly from the power s upply, the BGA *shouldn't* be the problem (although who knows for sure?). The BGA is powered from one or more dc buck converters on the main, and th ose are generally current protected, so if the BGA were to short for instan ce, the buck converter feeding it would shut down but the rest of the board will have power on it - and I'm speaking generally here on this board. If the standby goes away when you plug in the main, then do a basic dc resist ance to ground on the standby line and trace out the short.
If the standby voltage on the power supply stays on when you connect the ma in, check the ps on command from the main back to the power supply. This s hould be low when in standby and should go to 2.5 - 5V when the power butto n is pushed.. If the line goes high, then the rest of the supply should tu rn on. If the line goes high and only the standby voltage stays on but eve rything else stays low, check the run lines for dc resistance to ground and trace it out.
You can test the power board on the bench by applying AC and jumping the st andby pin to the on command across a resistor. If the standby voltage is 5 V, a 270 ohm resistor should be safe. If the standby is 12V, I'd use a res istor and zener to get the voltage down below 5V before applying it to the ps on command line. When you jump the standby to the ps on line, the rest of the voltages should appear if the power supply is good.
If the standby voltage is working but the on command voltage to the power s upply stays down when you push the power button, then the BGA could be torc hed.
Very possible. That is what happened when I reflowed a bga chip on my son's X-Box.
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:M550SV 55" randomly shuts off/on.. I checked the voltages on power supply b oard all are correct.. after doing research online, there seems to be a fir mware problem. i hooked up to their website, couldn't find any updates.. is there a fix to this TV, ???
of symptoms. No new ones are available, and used ones may put you in the s ame boat in a few months. Even when Vizio sells them, they are "recertified ", which means they tested them to see if they work for 5 minutes and box t hem for sale. We've reflowed the BGA chip with inconsistent results but no longer take those in for service.
it doesn't seem Vizio ever released a later version of the firmware it was shipped with.
a hot air soldering gun, im gonna try to reflow it. would 350 degree's for
2-3 minutes suffice???fully because the sink will be stuck to the BGA. If you rip the BGA off the board, it's junk.
should be reballed or the chip outright replaced. Because of the drop in p rice for a new TV, we've stopped servicing this model.
t works, considering opening a hole in the back cover and adding a slow mov ing fan.
ound five bulging caps 220uf, 25v all the same. on the main board. ordered new ones, will post if successful..
zen on screen, then i tried to heat up the BGA chip, now the set is dead..? ?? no logo, no back lights.
eflow the crappy lead free solder that is brittle and flows at a higher tem perature than tin/lead that they use these days, but that much heat is clos e to where the chip dies... temperature over time. You also need to be sure you don't warp the board under the chip while you're doing this.
f condition, and now you said it was getting stuck on the Vizio logo on the screen. That's a different issue altogether, although it's probably too la te now because you might have torched the BGA.
nerally a corrupted NAND chip on the back side of the board. It's a 48 pin surface mount TSOP1 flash (the only one on that board) and isn't easy to ch ange if you don't have surface mount soldering experience. I used to change them when the TVs were pretty new until the BGAs started acting up as the TVs got older and built up miles.
can order one of these already programmed from a guy in Texas - I think it' s Coppell TV or something close, and change it if you can solder tight pitc h smd stuff. If not, keep trolling ebay for a cheap one.
getting zero volts going to the main board on all pins. looks like a short, checked all connections. maybe i could have melted the solder under the ch ip when reheating and created a short???
I did look for shorts, didn't find any. i do get 5v stanby. I get 5v on fu se one on main board nothing on fuse two, and no voltage on ce2 and ce2 cap s, these are two of the five bulging caps that i replaced... i get 5v on vo ltage regulator main board
On Sunday, November 22, 2020 at 12:27:47 PM UTC-5, snipped-for-privacy@gmail.com wro te:
m getting zero volts going to the main board on all pins. looks like a shor t, checked all connections. maybe i could have melted the solder under the chip when reheating and created a short??? x.
use one on main board nothing on fuse two, and no voltage on ce2 and ce2 ca ps, these are two of the five bulging caps that i replaced... i get 5v on v oltage regulator main board
Did you check for the ps on command from the main back to the power supply?
These things "ping pong". The power supply sends the standby voltage to th e main when AC is applied. The main (on command) then sends a logic high b ack to the power supply to turn on the rest of the supply. The power suppl y goes into full run and provides the rest of the voltages, including the 1
2V or 24V back to the main to allow full operation.All we know right now is that you have the first step: the standby voltage. Push the power button and see if there's any change on the command line b ack to the power supply. If not, best odds is that the BGA got torched dur ing the reflow.
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I'm getting zero volts going to the main board on all pins. looks like a sh ort, checked all connections. maybe i could have melted the solder under th e chip when reheating and created a short???
fuse one on main board nothing on fuse two, and no voltage on ce2 and ce2 caps, these are two of the five bulging caps that i replaced... i get 5v on voltage regulator main board
y?
he main when AC is applied. The main (on command) then sends a logic high b ack to the power supply to turn on the rest of the supply. The power supply goes into full run and provides the rest of the voltages, including the 12 V or 24V back to the main to allow full operation.
e. Push the power button and see if there's any change on the command line back to the power supply. If not, best odds is that the BGA got torched dur ing the reflow.
with AC applied. I jumped standby pin to pwr_on pin with a 270 ohm resistor . I got 12v on 3 pins of the power supply. TV did not power on. No voltage going to the backlights.??? so i guess the BGA is fried???
d I'm getting zero volts going to the main board on all pins. looks like a short, checked all connections. maybe i could have melted the solder under the chip when reheating and created a short???
on fuse one on main board nothing on fuse two, and no voltage on ce2 and ce
2 caps, these are two of the five bulging caps that i replaced... i get 5v on voltage regulator main boardply?
the main when AC is applied. The main (on command) then sends a logic high back to the power supply to turn on the rest of the supply. The power supp ly goes into full run and provides the rest of the voltages, including the
12V or 24V back to the main to allow full operation.age. Push the power button and see if there's any change on the command lin e back to the power supply. If not, best odds is that the BGA got torched d uring the reflow.
or. I got 12v on 3 pins of the power supply. TV did not power on. No voltag e going to the backlights.??? so i guess the BGA is fried???
From my chair, yes. Again, BGA reflow is a bit of an art (and maybe some V oodoo as well). I admit I don't have a handle on this either but since rep lacing BGA chips on TV mains are not economical, so a reflow is get out of jail free card if it works.
No new mains have been available for that series since shortly after the TV was first made, and most of that model have issues with the main board. S ince the board has several known issues, a used main board is a crap shoot. You may be back in the same boat in 6 months if you install a used board. I'd troll around ebay and wait for a cheap one that has a guarantee attac hed. That model is a good performer (local dimming as well), but it had is sues for sure.
e:
:" randomly shuts off/on.. I checked the voltages on power supply board all are correct.. after doing research online, there seems to be a firmware pro blem. i hooked up to their website, couldn't find any updates.. is there a fix to this TV, ???
oms. No new ones are available, and used ones may put you in the same boat in a few months. Even when Vizio sells them, they are "recertified", which means they tested them to see if they work for 5 minutes and box them for s ale. We've reflowed the BGA chip with inconsistent results but no longer ta ke those in for service.
t seem Vizio ever released a later version of the firmware it was shipped w ith.
soldering gun, im gonna try to reflow it. would 350 degree's for 2-3 minut es suffice???
ause the sink will be stuck to the BGA. If you rip the BGA off the board, i t's junk.
e reballed or the chip outright replaced. Because of the drop in price for a new TV, we've stopped servicing this model.
considering opening a hole in the back cover and adding a slow moving fan.
what direction is the fan moving, sucking out, or blowing in???
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te:
55" randomly shuts off/on.. I checked the voltages on power supply board al l are correct.. after doing research online, there seems to be a firmware p roblem. i hooked up to their website, couldn't find any updates.. is there a fix to this TV, ???ptoms. No new ones are available, and used ones may put you in the same boa t in a few months. Even when Vizio sells them, they are "recertified", whic h means they tested them to see if they work for 5 minutes and box them for sale. We've reflowed the BGA chip with inconsistent results but no longer take those in for service.
n't seem Vizio ever released a later version of the firmware it was shipped with.
ir soldering gun, im gonna try to reflow it. would 350 degree's for 2-3 min utes suffice???
ecause the sink will be stuck to the BGA. If you rip the BGA off the board, it's junk.
be reballed or the chip outright replaced. Because of the drop in price fo r a new TV, we've stopped servicing this model.
, considering opening a hole in the back cover and adding a slow moving fan .
It doesn't really matter. All you're trying to do is get a bit of air move ment over the heatsink, and you'll get that either way as long as the fan i s close enough to ensure the exhausted air is moving over the BGA heatsink and not around it. Even a relatively small amount of additional air moveme nt over the heatsink will make a big difference in the operating temp of th e BGA.
One thing I have noticed is that there was a mandate to all manufacturers making new TV's to have the power supply shut down seconds after there is no signal detection on the system's computer when not in setup mode, in addition to making the power supplies energy star rated and extremely efficient (80% or higher). The high cost of energy created this mandate because older TV's were "power hogs" that ate up hundreds of dollars of cost just to run them monthly.
With that in mind, if there is no signal present on any input after 30 seconds, the set will shut down. You have to have an actual signal (whether it be analog or digital) there for the set to continue running. If the computer sees no signal there the system will shut down. You at least need a video signal there for the set to remain on. Audio is subject to adjustments and mode. Hope this info. helps. Also, this has been an issue for 14 years, so I educate customers on this.
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