Acer AL1916 restarting (at a random time)

[RethoricalCheese]

I have received an LCD monitor AL1916, which works fine... until it restarts at a random point.

Because it happens randomly, I have no idea where to start looking for the problem.

Maybe somebody could point out which area could be problematic?
Is it caused by controllerboard or powerboard?

[smason]

Re: Acer AL1916 restarting (at a random time)

Define "restarts"
Does it power off, and you have to push the power button?

[RethoricalCheese]

Re: Acer AL1916 restarting (at a random time)

It powers off and starts up by itself.

[smason]

Re: Acer AL1916 restarting (at a random time)

Most likely the power supply, quite likely caps.
Post some photos, we'll have a look.
I've done 4 1916s. 2 1916s 1 1916B and a 1916WA 3 were bad caps 1 was bad caps and a shorted FET.

[RethoricalCheese]

Re: Acer AL1916 restarting (at a random time)

I received this LCD a long time ago and at that moment I tried replacing caps but it did not help.
I will open this LCD up again tomorrow and check what have I done there exactly.
Maybe there is a bad solder or some leftover solder which may have an effect on it. I will check that.

[RethoricalCheese]

Re: Acer AL1916 restarting (at a random time)

715G1492-2 is the board in question.

Most the caps have been replaced. Only 10uF 50V Elite (C908) and 4.7uF 50V KY (C209) + big cap have not been replaced.

I did not find any bad soldering nor leftover solder.

Transformers tested OK