Hi Group, can someone help please?, This Sceptre 55 inch tv can to me with no backlights, I repaired those and they are working fine. Now i have a fai nt blue screen, no pic and no signal, I have no remote, the only button tha t works is the on/off. I replaced the main board three times, along with th e tcon board, no results. there is proper voltage to the main board. I test ed the fuse on the tcon bd and there is 12v. no voltage on pins to the ribb on cables to the panel, they are all less than one volt. any help in this m atter will be taken seriously, Thanks.
h no backlights, I repaired those and they are working fine. Now i have a f aint blue screen, no pic and no signal, I have no remote, the only button t hat works is the on/off. I replaced the main board three times, along with the tcon board, no results. there is proper voltage to the main board. I te sted the fuse on the tcon bd and there is 12v. no voltage on pins to the ri bbon cables to the panel, they are all less than one volt. any help in this matter will be taken seriously, Thanks.
Something may have gone wrong when you removed the display from the frame. It could have been a static discharge or a damaged ribbon on (one of) the a ddress board(s).
If the tcon has two ribbons to the display, see if it runs with just one ri bbon connected to the display (then try the other side).
Otherwise, you really should scope the differential signals both going into and out of the tcon to see what's going on.
ith no backlights, I repaired those and they are working fine. Now i have a faint blue screen, no pic and no signal, I have no remote, the only button that works is the on/off. I replaced the main board three times, along wit h the tcon board, no results. there is proper voltage to the main board. I tested the fuse on the tcon bd and there is 12v. no voltage on pins to the ribbon cables to the panel, they are all less than one volt. any help in th is matter will be taken seriously, Thanks.
. It could have been a static discharge or a damaged ribbon on (one of) the address board(s).
ribbon connected to the display (then try the other side).
to and out of the tcon to see what's going on.
yep, three tabs on the left and right side of the panel are damaged. are th ese fixable or just trash the tv..?
with no backlights, I repaired those and they are working fine. Now i have a faint blue screen, no pic and no signal, I have no remote, the only butt on that works is the on/off. I replaced the main board three times, along w ith the tcon board, no results. there is proper voltage to the main board. I tested the fuse on the tcon bd and there is 12v. no voltage on pins to th e ribbon cables to the panel, they are all less than one volt. any help in this matter will be taken seriously, Thanks.
me. It could have been a static discharge or a damaged ribbon on (one of) t he address board(s).
e ribbon connected to the display (then try the other side).
into and out of the tcon to see what's going on.
these fixable or just trash the tv..?
Back when LCD TVs were *expensive*, you could replace the ribbon tab (as lo ng as the glass substrate wasn't damaged) but you would need a re-tabbing m achine and have at it. I believe there's a video on youtube on how to repla ce a bonded flexible ribbon tab using such a device.
Today, a defective screen is junk unless the problem is on the address boar ds. But a damaged ribbon, bad COF, or cracked glass means the recycle bin.
Consider that a lesson learned and paid for, and be careful on the next one ..
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