ViewSonic N3760w LCD with bad caps

[madman604]

Re: ViewSonic N3760w LCD with bad caps

well i got the caps from Digikey and replaced the suspect, but not obviously faulty caps.

The TV got really weird. at first it seemed to be fine. then started turning on and off rapidly after a few seconds.
turned it off and unpluged the tv. later it stayed on for 2 hrs and i turned it off and went to bed.

next day it would randomly turn on then off again.

any more ideas?

[cosmicdust]

Re: ViewSonic N3760w LCD with bad caps

I have a Viewsonic N3752 that about 8 months ago failed to produce a picture. There is no picture, a.k.a. “blank screen” no matter the input selected. There is, however, sound. The unit otherwise functions as far as I know. After some research, I concluded that the power supply (FSP271-5F01) may need repair, so I ended up ordering 15 capacitors (a "kit" was available for just this PSU, from many sources). I first replaced the three that were obviously “swollen” or bulging at the end (the sign of being blown), but there was no change. So I proceeded to replace the rest. However, now when the unit is powered on, there is a brief pause, then a click, and the screen flickers (did not do this before the "repair", simply sat blankly). I am not certain that it "clicked" like that when it was fully functional, but I think that it did. Additionally, there were two of the capacitors that I removed at the same time, a 220u25V and a 220u35V (from locations CS33 and CS6), that I did not mark when I removed, so it took quite a bit of research to figure out which one went in which location, but I am reasonably certain they are in the correct spots (CS33=35V; CS6=25V).
Any thoughts, before doublecheck and resolder every wire I soldered…or I plunk down for a replacement power supply?

Thanks in advance...

[henpitts]

Re: ViewSonic N3760w LCD with bad caps

I know this is an old thread but thanx for the info. I recently put a Viewsonic back into service and the wait time to hold the power button eventually went from 20 seconds up to about 3 minutes. Caps are swollen so I will order replacement caps.

[madman604]

Re: ViewSonic N3760w LCD with bad caps

Ive since dumped the tv. Wasnt worth the effort anymore.