The Dell Studio PC is dead. I tried to turn it on and got _nothing_ except the yellow green LED on the power supply which, from what I understand, on ly means it's plugged in. I checked the "on" switch with an ohm meter and it works. (Turning it on with the big toe is not damaging apparently.) I removed the power supply and ran a jumper from pin 3 to pin 4 on the 24 wir e connector to bypass the mother board. This turns on the PS fan and provi des voltages from 5v - 12v to the 21 other pins with wires.
On the plus side everything seems to be intelligently engineered [idiot pro of] enough to give another new or used mother board a try. This would be d one under the assumption a whole lot of other things didn't also go wrong a t the same time.
If something _else_ could be wrong I don't want to throw good money and tim e after bad.
pt the yellow green LED on the power supply which, from what I understand, only means it's plugged in. I checked the "on" switch with an ohm meter an d it works. (Turning it on with the big toe is not damaging apparently.) I removed the power supply and ran a jumper from pin 3 to pin 4 on the 24 w ire connector to bypass the mother board. This turns on the PS fan and pro vides voltages from 5v - 12v to the 21 other pins with wires.
roof] enough to give another new or used mother board a try. This would be done under the assumption a whole lot of other things didn't also go wrong at the same time.
ime after bad.
I've revived quite a few dead motherboards by replacing bad power supply ca ps. Motherboards often solder directly to ground or power planes meaning yo u need a GOOD soldering iron and possibly a small hot air gun to get a litt le more heat than can be conducted down the wire.
New mobos are often equipped with solid polymer caps (MUCH better for life and performance). I've 'upgraded' some caps to polymers with good results. The most troublesome caps are often the ones closest to the processor. 1000
-2000 uF at 6.3 volts are common.
While bulging caps are bad, non bulging ones are not necessarily good. An E SR meter isn't all that helpful either as many time I measure the board aft er the cap is removed and it still reads 'good'. Obviously it can't be.
It's not for the inexperienced but it isn't a big deal to replace caps. BUT , the question is, why bother? We have some PCs at work that require older OSs or some peripheral that needs the old board but the new ones are SO muc h better. BTW I wouldn't have a Dell for any reason but then again I'm a curmudgeon.
On Thu, 10 Sep 2015 20:02:15 -0700 (PDT), Bret Cahill Gave us:
Every stop to think that a failure of a device connected TO the power supply is dragging it down, and it will not even switch on to protect itself?
The engineering failure is all yours.
Could be the vid card. could be a hard drive spindle driver FET. Could be the mobo itself. Could even be the PS and it does not appear bad when hooked up no load.
Yeah, you shouldn't see the 5V dropping much when 5v is loaded sounds stuffed to me: a failed repair attempt could easily cost more in damage than a new one.
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