Re: lp2407 aka fpd2485W No Power

No, the daughterboard looks fine.

Re: lp2407 aka fpd2485W No Power

When I was testing the voltage on the SMPS the first time something happened and the power supply started working. I might have shorted pins 15 and 16 but i'm not really sure

Re: lp2407 aka fpd2485W No Power

Ya but those were intentional since in those spots the trace came off the board so I just tested to make sure the trace was joined to a neighbouring pin and bridged the pins for a better connection. They were already joined electrically. I know the basics of electronics.

Re: lp2407 aka fpd2485W No Power

Ok so I measured the voltage on the IC and its 15.87v also.
But something weird happened the first time I tried- I think I may have shorted it accidentally, but then the power supply started humming and I measured voltage coming off of it, 5v and 23v. I turned it off and then on, but again no voltage.

Re: lp2407 aka fpd2485W No Power

3) SMPS photo attached
4) Indeed I did change that small cap,
15.87v DC across it.
5) There are 2 Panasonic caps (the 10uf 50v and 1000uf 25v), the rest are Nichicon....

Re: lp2407 aka fpd2485W No Power

Thanks Bill,

1. Checked the polarity on the caps. All look ok.
2. Checked for cap solder bridge shorts using DMM. Also look all good (pretty easy soldering actually)
3. No idea what SMPS is.

attached are the pics...

Re: lp2407 aka fpd2485W No Power

I have the same issue- no signs of life at all from the monitor. I noticed a few bulging caps on the power supply, inverter and signal board and replaced them all. I also replaced ALL the caps on the power supply just to be sure. I did make a small error in ordering caps so for the 2x 450uf 35v 125C i got the same but rated for operating temp 105C, installed them anyway.

When I plug in the power supply, I've measured 164v across the big 450v cap and I checked the fuse and its ok obviously.

However, when I check the voltage...

Re: Gateway 24" LCD Model LP2407

I've had the exact same issue as everyone here, glad I found this forum! I'm ordering caps for all 3 boards, as I noticed bulging on not only the power supply but the mainboard and the left board that controls the backlights (2 caps).
I'll post again when I get some results.

Notes:

- Its VERY tricky to get the LCD's plastic housing off. I got it off but with many scratches and frustration. as the plastic clips holding it together are very tight.
- The cable to the front power button can rip out easily...