Re: HP W19b Monitor Inverter/Power board ?'s Overheating?

I ran it for about an hour inside wth no probs... Maybe a bad/weak solder joint? Alexanna, I'm just guessin those ccfl's aren't too easy to change out? I'd bet you could just buy a monitor on ebay that doesn't work and combine the 2. This is actually a 3rd monitor for me, I didnt want to buy 3 like monitors new and the only one like the 2 I had was broken on ebay...

Anyways. So far so good.. Thanks again everyone. This is a great place to find answers.

Re: HP W19b Monitor Inverter/Power board ?'s Overheating?

I tested the transformers.. with a cheap meter, but found that they were consistant with eachother. Both primaries ohm'd at .439 and .438 Kohms. Secondaries across all pins were .2. I took the advice to resolder all thru board points. I ran the monitor at 100% brightness for over an hour and it stays on. I wonder if the problem is solved? The only way I can get it to fail (prior to hopeful repairs) was fully assembled and in the house. I'm in the garage now, and it is cooler out here. I will try this next.

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Re: HP W19b Monitor Inverter/Power board ?'s Overheating?





I have 2 identical monitors that work properly, so I can subtitute parts. I will try to rule out ccfl's.



The monitor was at 50%, but I will try to raise/lower to see if it makes any difference.



I will resolder the joints and see if that helps too.

Thanks for all the great tips and also for helping me to understand that the one heatsink should be warmer! I will post results in a bit!...

Re: HP W19b Monitor Inverter/Power board ?'s Overheating?

None at all. Just goes black. Thanks!

I have tested this monitor to find that after 20 minutes or so the inverter circuit shuts down. The display board is still functional (flashlight test). When the monitor is disassembled, it funntions longer. This tells me.. may be a big bad guess, but that something is getting too hot. I felt the 3 heat sinks on the board for about 30 minutes while the cathodes were on and found one gets significantly hotter than the other 2. I have pointed at this with a green arrow in the first image. The second is a closeup. These forums have been so helpful to me in the past just by reading and this is the...