Testing Repaired Monitors

[killian6pk]

After getting a monitor running and hooking it up to a computer, how long should you let it run before being reasonably sure that it is going to continue running. Also is there any other testing to do, like turning it off and on several times, that will help insure that it is fixed and will stay that way.

[richb74]

Re: Testing Repaired Monitors

Killian,
I usually test my monitors for a good hour just in case the panel has a bad lamp.

Rich

[alexanna]

Re: Testing Repaired Monitors

I let my repaired monitors run a good 24 hours,Letting them going to sleep and repeatedly waking them up.
There are some repairs you just know everything will be OK and those are the ones that come back to bite you in the gluteus maximus.

[retiredcaps]

Re: Testing Repaired Monitors

I let my repaired monitors run a good 24 hours,Letting them going to sleep and repeatedly waking them up.

Same as above. In one of my early Benq board repairs, I didn't resolder the inverter transformer pins and 24 hours later, the picofuse blew again. I changed the picofuse and resoldered the inverter transformer pins and then ran it for about 1 week before I declared it "fixed".

[mariushm]

Re: Testing Repaired Monitors

I just give them to my sister or my brother to use them as second monitors on their computers for a while

[killian6pk]

Re: Testing Repaired Monitors

Thanks guys that was what I wanted to know. I have repaired 5 monitors and 2 of them would not come back on several days later. I had tested each one for a couple of hours. I hooked them back up to the computer to recheck them one more time and each would not come on. So I guess I need to be letting them run for a much longer period of time.

[shovenose]

Re: Testing Repaired Monitors

I think using them as a secondary monitor, or as the monitor for your workbench (if you have one) so that they get some real-world experiences before being sent back out to brave the wild world by themselves

[PlainBill]

Re: Testing Repaired Monitors

It depends on the circumstances. Usually I go for a 24 hour burn-in, and test several resolutions and both input connectors if present. However, if this was a 'shotgun' repair - indeterminate cause, replace all caps, now it works, old caps are barely above spec for ESR, I opt for a much longer test time.

I recently had one - a 17" Dell with 'two seconds to black'. I determine one CCFL is bad, replace it, let it run for 24 hours. No problems, so I button it up and put it on the computer my Grandson uses when he visits. A month and about 60 hours of use later it pops up 'two seconds to black' again. It made me glad I hadn't sold it!

PlainBill

[killian6pk]

Re: Testing Repaired Monitors

I understand fully. I have a Sharp that ran for several hours on my test computer. I took it off and prepared to try to sell it. Put it back on the computer to get a picture of it working and it would not come on. It was a really pretty monitor when it was running before its second death. I will exhume the body and try again to reinvigorate it, maybe it will live again.

[Amraks]

Re: Testing Repaired Monitors

I have my girlfriend testing one I just repaired, She don't know she is the test mouse shhh.

So far its running fine playing her farkle game.

[999999999]

Re: Testing Repaired Monitors

Depends on what part failed. If it acted completely dead and was just bad caps, after replacing the caps and having it work immediately I feel pretty confident about the repair if it is still working after it gets up to steady running temperature, is turned off then back on again at that point.

Actually I feel that way about most repairs, but to put things in perspecitve if you have a power issue it can subject parts to excessive ripple/voltage, and that can cause any degree of damage that surfaces immediately, an hour later, a day or week or months later. Every minute it runs you decrease the chance it still has the problem but if a couple fail 3 days later that doesn't really suggest that 4 days, or double it to 6 days, has any significance as the *right* testing period to use. If it's a mission critical part you just get it working and sell it off as repaired, replacing it with new for the critical use.

An alternative view might be that test length depends on consequences if it fails again soon vs available time to test, workspace you can devote, etc.