Re: VP201b Heat-Related Screen-Half Flake Out

lucky13,

Thanks for the info, it makes a lot of sense now why there is a diffuser - for some reason it didn't occur to me that the back light needs to be diffused. Is the T-con board possibly replaceable, or are they generally permanently attached?

Re: VP201b Heat-Related Screen-Half Flake Out

I finally got around to placing the inverter and logic board from my original monitor into the one I got used from ebay, and so far it has not had any problems.

My only complaint is that the LCD from ebay is very dark and tinted brown. I've tried to find information about what is causing the darkness/brownness, but all that I've come up with is a brief mention of needing to replace the diffuser paper. Well, I didn't know LCDs had diffuser paper, but anyway, I'll probably leave it how it is.

In summary, the...

Re: VP201b Heat-Related Screen-Half Flake Out

Well, wouldn't you know it - as soon as I was confident that the problem was better, it came back. Tonight (hopefully) I am going to move the electronics over to my other panel, and I will report back if that fixes it.

Re: VP201b Heat-Related Screen-Half Flake Out

Since I replaced the inverter I have not had this monitor apart again. Right after the inverter replacement it had the same issues for a couple of days as it originally had, however recently it has not shown any signs of trouble, even during heavy use. I am puzzled; maybe it was a loose connection or something, but how could it improve by just being used more? I'll be hanging on to my parts monitor, of course, but for now I'm going to leave things as they are.

Re: VP201b Heat-Related Screen-Half Flake Out

Well, I swapped in a different inverter and I now have the same problem I did in the beginning. I know it's not loose cables, bad electrolytics, the inverter, or an individual ccfl. My guess is either the logic board or the panel itself has problems. Next i'm going to move the logic board and the inverter over to my "parts" panel and see what happens.

Re: VP201b Heat-Related Screen-Half Flake Out

Sorry for the double post, but I'm not sure how to edit my previous message. Anyway, I got all the capacitors replaced with Panasonics (except the big one on the psu) but now it looks like the vertical refresh rate is messed up. I did forget to insulate part of the back of the inverter board where I cut away the plastic so I could solder in new caps, so it could be shorting or arcing to the frame; looks like I'll be cracking it open again tonight.

I also discovered that the only problem my parts monitor has now is with...

Re: VP201b Heat-Related Screen-Half Flake Out

I did originally have that brown stuff on the back of the main board, and cleaning it off didn't seem to make any difference. However, after reseating the LCD end of the ribbon cable I only saw a brief glitch so far (it lasted less than a second) in a couple of hours of running the monitor. I haven't put the case back together yet, as I am planning to replace a few capacitors tonight, but I'll report back in a couple of days and let you know how everything went.

Re: VP201b Heat-Related Screen-Half Flake Out

I have a VP201b with exactly the same problem, except that it only affects the left half of the screen. I have the same power supply, and there are no visually apparent problems with any components.

The output voltage of the PSU under load is 17.70v. Individual bulb voltages measure (from the small return wires to ground):3.14, 2.96, 3.13, 3.00. The brown caps are all Taicons and the blue ones are Nichicons.

I also have another broken VP201b that I could take some parts from, although i think that...