My Acer AL1912 flat monitor that I bought on secondhand was suddenly dead. No power.
I dismantled it and found 6 suspected capacitors that were bulged. elevated or tilted. Those elevated had also decrease in capacitans.
Removed them and found with an ESR-meter that 4 was very low in capacitans.
Ordered new capacitors and soldered them in. After that the monitor was working again.
Each capacitor had a number on the circuitboard on both sides which make exchanges easy.
C101,C106,C108,C916 470 µF 16 V
C207 33 µF 50V
C907 22 µF 25 V
After 2 months the monitor got another problem that the screen was dark.
It was caused by one of two transformers was dead. I checked that by measuring resistance over the pins and one transformer had no resistance (dead) and the other about 500 Ohm. The transformers gives 600 V that is needed for CCFL-tubes or backlight to light up. Also flat TV sets have backlight. If the backlight tubes are dead you can see the image if you direct a flash light against the black screen, when its on. Did not work in my case. The monitor have 2 CCFL-tubes (fluorescent tube diameter 2 mm) at the top and 2 CCFL-tubes at the bottom. You can buy a universal inverter to provide current for the CCFL-tubes, but this monitor can be 20 years and soon can other things fail like the CCFL tubes that lasts only 40 000 - 80 000 hours. Here is the information about troubleshooting black screen problems.
