Re: AL1916W DAC-19M008 recapped, no backlight

I reassembled my monitor and decided to reconnect it to the computer to make sure I still had the LCD display functioning. As soon as it powered on the ccfls came on, the "Acer" logo appeared, and the screen came up just like normal. The backlights were working fine. Then I lost them after about 5 minutes. I played around for about two hours (various combinations of powering on and off, coupled with DVI input on and off) and managed to have limited success maintaining backlight function. At one point I had a fully lighted display...

Re: AL1916W DAC-19M008 recapped, no backlight

I think someone made a good call on the lamps, looks like some burning. Here are some photos for verification. Photos T1 and T2 are both ends of the top light, photos B1 and B2 are both ends of the bottom light. Just a few questions:

1) I had backlights for several hours after caps and inverter replacement. It seems strange the ccfls would suddenly burn out. Is that a sign of another problem or just strange coincidence?

2) Looks like burning occurs on both fixtures at the wire side, just wondering if this...

Re: AL1916W DAC-19M008 recapped, no backlight

One more quick question...

The solder side has a lot of exposed, heavy raised solder lines arranged in parallel patterns. My online research has not produced an answer yet. Just curious.

Re: AL1916W DAC-19M008 recapped, no backlight

Thanks for the feedback so far. I will likely try and open up the monitor after I get back next week from vacation, and take a look at the lamps. Here is some more info...

1) Resistance across the outside pins on both ends of the transformer are the same at 830 ohms each. I have an analog multimeter so the value might be slightly off but the measurements were nearly identical.

2) Can the AOP605's be tested while soldered in, or do they need to be removed? I measured S1-G1, S1-D1, G1-D1, S2-G2, S2-D2, D2-G2....

Re: AL1916W DAC-19M008 recapped, no backlight

Thanks for the quick reply.

1) each side of F200 measured 16-17 V
2) brief check of both MOSFETS indicates similar resistance in both units. Measured S1-G1, S1-D1, D1-G1, S2-G2, S2-D2, D2-G2 based on another post.
2) resistance is the same across the pins on each end of transformer at ~800 ohms
3) not sure how to check ccfl wiring or tube. Visual check of connectors indicates nothing unusual.

My Acer LCD monitor went black about a month ago. The green "on" light came on when powered up and the orange standby light came on when the system was left alone. The orange light changed over to the green light when the mouse was moved, so it seemed to cycle normally. I read several posts on badcaps and decided to recap the power board. I ordered a repair kit from ebay and replaced the 2 MOSFETS and all the following caps (nichicon brand). The F102 fuse had continuity so I left it alone.

AOP605 Inverter MOSFET
2200uF-10V 105ºC Capacitor
1000uF-25V 105ºC...