Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Hi everyone. As a follow up, I've kept the case off my monitor since I wrote my first post. Today, it started to flick on and off again. I'll probably replace all of the smaller caps in the power supply, but leave the large filter cap and the caps on the inverter board. I'll update again when I get a chance to get it done, thanks for your suggestions. Any idea of the best way to remove the gunk under the capacitors as well? I assume it's a glue or epoxy.

Also, with the poor power supply...

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers



I have had the monitor in an upright position since I took the back off. I still have not had the flicker occur again. I did try to briefly hit the power supply with a hair dryer, but did have any luck reproducing the flicker. I'll try again later with a more powerful hair dryer.

Another thing that leads me to believe the problem is related to the capacitors is that there is a loud, high pitched whine when the power is plugged in, but when the monitor is off. It sounds...

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

On my monitor, the fuses are all intact. That chip is marked with "4419 BA6515" and a logo that could be "Alpha and Omega Semiconductor", but it's hard to make out on my chip. A&O does have a part with a 4419 marking, it's a P-FET and it's in an 8 pin package like this part. I haven't been able to find out more.

What do you want us to measure exactly on the wiring harness?

As an aside, I haven't had any flicker since I pulled the monitor apart. I did...

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Hmm, maybe it's not heat related, I'm a bit confused now? I tried heating the power supply with a hair dryer, my infrared thermometer reads 70-75C, but it's still not turning off. Sorry, I'll try again later tonight if you have another idea. Perhaps it was just a loose connection? I'm still concerned with the power supply whine though.

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Here are the higher resolution photos, sorry, I thought the directions said to make them lower resolution.

I don't think I can remove the heat sinks easily. They're riveted and soldered on. I'd prefer to hold off on bending them away unless it's required.

I do have a multimeter, but the LCD hasn't turned off since I took the back of the screen off. The period that it does turn off is really short as well, less than a second or two, so I think it might be tough to get a...

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Here are the requested photos, if you need closer or higher resolution photos, I'd be happy to oblige. There are two other capacitors on the inverter board, but they appear the same as the photo provided here.

The brown capacitors appear to be Chemi-Con (the empty rectangle logo). I don't know the brand of the capacitors on the inverter board.

Thanks again for your help....

Re: Westinghouse L2410NM 24" LCD power goes on and off, blue light flickers

Hi everyone! I too have a Westinghouse L2410NM 24" and the back light has begun turning on and off intermittently. I can also hear a high pitched whine from the power supply, but I cannot see any obviously bad capacitors. I suspect that there is a heat issue since running it with the back off seems to have eliminated the problem. Using an infrared thermometer shows temperatures in the power supply at 50-60C. The whine appears to be coming from near the transformer.

Should I just replace...