Acer AL1916W Ab issue

[emta41]

Hello,
Ive read a lot of about possible issues with AL1916W, but I can still find out the right source of the issue.

Monitor after power up flash up for 1 second, green LED flash up for one second and thats all.

My AL1916W had:
1) Bulged caps CE108, CE103, C204, all 220uF/25V on inverter board. Replaced.
- still same issue
2) The fuse F200 was blown out. Replaced.
- The inverter board start work every second and shut down and again, again...

3)Q206 AP40T03GP was blown. replaced with IRF540N. Its only for test, because IRF540 has Qg 47 nC and AP40T03GP has 8,8nC. It means that IRF540 will have bigger power loss(because the frequency) and the temp of IRF540N will be higher.
- the issue and behavior is the same as it was at start of replacing. One flash of LCD and GREEN LED for one second and will come the dark after forever.

Do you have any idea or hint, what else should be wrong or broken?

I will be happy for any answer.

[budm]

Re: Acer AL1916W Ab issue

I would replace the cap for the +5v power supply section also, bad cap can look normal.
You may have bad transformer, bad lamp assemblies, ect.
Please post good clear pictures of the board, bot sides.

[sabre504]

Re: Acer AL1916W Ab issue

Also check the voltage regulators on the video board ,
had one do the same after recap turned out to be a 3.3v not working

[Rtech]

Re: Acer AL1916W Ab issue

I have used the IRF 540 as a replacement for the last 2 years with no failures or returns.