Background:
The monitor is from 2008, used 12+ hours a day. The monitor first had problems about 3 years ago. Once or twice a month it would just go black for a few seconds and then come back on. Until one day it didn't come back on. I could power cycle it and it would turn on for a few seconds and then go black. I don't recall it flickering before it went out, but it may have.
After some googling and reading here I took it apart and noticed a popped cap. Having never done anything like this I figured I would gamble $5 that it was the problem so I ordered a replacement cap and replace it. It was surprisingly easy and it worked!
Current Symptoms:
A few months ago the same symptoms started up. Very rarely, blackness for a few seconds. Last week it went off for good. I can turn it on and if it is cold it works for a couple of minutes and then goes black. If I power cycle it after this it will stay on for 10-30 seconds, start flickering in brightness for several seconds and then black. Power light stays on the entire time.
What I've done so far:
I opened it up again and found another cap had popped. This time I ordered all the caps except the one I had already replaced. I hindsight perhaps I should have done that one too, but at the time I kind of assumed the problem was the old next to it that had popped and I was just replacing all the other old caps to avoid future issues.
I replaced 4 Su'scon SG and one Samsox GK, with equivalent United Chem KZE caps. I also replaced 2 Su'scon SH (47uf, 25v, 125 deg C) with Rubicon RX30 (47uf, 50v, 130 c) because they were the closest high temp caps I could find.
I didn't actually replace all the caps because I noticed that 5 I ordered were actually for the audio, which is and has never been used. I also didn't replace the large Su'scon 150uf 420v cap. (These are all in the bottom right corner in the first pic)
After this was done I put it all back together and it seemed to work fine for 2 minutes, until it went black. The symptoms were unchanged. I have taken it apart again, inspected all the soldering joints, particularly my own, and they look good to my eye.
I suspect it may also be the CCFLs. I popped off the bottom frame and one of the two lamps was pretty scorched at both ends. I don't know if that indicates a problem or not. (see second pic)
I only have a multimeter for testing. I may be able to cannibalize a currently dead all-in-one PC for it's CCFLs for testing. Any advice is appreciated.
The monitor is from 2008, used 12+ hours a day. The monitor first had problems about 3 years ago. Once or twice a month it would just go black for a few seconds and then come back on. Until one day it didn't come back on. I could power cycle it and it would turn on for a few seconds and then go black. I don't recall it flickering before it went out, but it may have.
After some googling and reading here I took it apart and noticed a popped cap. Having never done anything like this I figured I would gamble $5 that it was the problem so I ordered a replacement cap and replace it. It was surprisingly easy and it worked!
Current Symptoms:
A few months ago the same symptoms started up. Very rarely, blackness for a few seconds. Last week it went off for good. I can turn it on and if it is cold it works for a couple of minutes and then goes black. If I power cycle it after this it will stay on for 10-30 seconds, start flickering in brightness for several seconds and then black. Power light stays on the entire time.
What I've done so far:
I opened it up again and found another cap had popped. This time I ordered all the caps except the one I had already replaced. I hindsight perhaps I should have done that one too, but at the time I kind of assumed the problem was the old next to it that had popped and I was just replacing all the other old caps to avoid future issues.
I replaced 4 Su'scon SG and one Samsox GK, with equivalent United Chem KZE caps. I also replaced 2 Su'scon SH (47uf, 25v, 125 deg C) with Rubicon RX30 (47uf, 50v, 130 c) because they were the closest high temp caps I could find.
I didn't actually replace all the caps because I noticed that 5 I ordered were actually for the audio, which is and has never been used. I also didn't replace the large Su'scon 150uf 420v cap. (These are all in the bottom right corner in the first pic)
After this was done I put it all back together and it seemed to work fine for 2 minutes, until it went black. The symptoms were unchanged. I have taken it apart again, inspected all the soldering joints, particularly my own, and they look good to my eye.
I suspect it may also be the CCFLs. I popped off the bottom frame and one of the two lamps was pretty scorched at both ends. I don't know if that indicates a problem or not. (see second pic)
I only have a multimeter for testing. I may be able to cannibalize a currently dead all-in-one PC for it's CCFLs for testing. Any advice is appreciated.
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