ViewSonic N3760w LCD with bad caps

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • madman604
    New Member
    • May 2013
    • 3
    • Canada
    #21
    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?

      Comment

      • cosmicdust
        New Member
        • Jul 2013
        • 3
        • USA
        #22
        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...

          Comment

          • henpitts
            New Member
            • Jul 2016
            • 1
            • USA
            #23
            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.

              Comment

              • madman604
                New Member
                • May 2013
                • 3
                • Canada
                #24
                Re: ViewSonic N3760w LCD with bad caps

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

                  Comment

                  Previous 1 2 template Next

                  Related Topics

                  Collapse
                  • momaka
                    Seasonic B12 BC-550 – barely 2 years old and with BAD CAPS already!
                    by momaka
                    I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.

                    For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).

                    https://www.badcaps.net/filedata/fetch?id=3591771


                    https://www.badcaps.net/filedata/fetch?id=3591772

                    It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:

                    https://www.badcaps.net/filedata/fetch?id=359177...
                    03-12-2025, 03:42 PM
                  • eryjus
                    Heathkit IO-4205 Power Supply Caps
                    by eryjus
                    Hello,

                    First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.

                    I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.

                    I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
                    ...
                    05-10-2023, 11:21 AM
                  • Paxman_Swede
                    Identifying caps on an old Zoom 9000
                    by Paxman_Swede
                    Hello!

                    I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.

                    The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.

                    I have studied the board and...
                    01-14-2025, 09:51 AM
                  • captain150
                    Help with switching power supply caps
                    by captain150
                    I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
                    I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,...
                    03-16-2025, 07:34 PM
                  • Foetuss
                    Gigabyte GA-6OXT :: caps question
                    by Foetuss
                    Good evening

                    I recently aquired a rev 1.1 Gigabyte 60XT, and was suprised of the amount of leaking caps for a motherboard of the P3 era. Especially the way the 330µf caps seems like the housing discolored even.
                    Now, there are some 3300µF 6.3V KZG series around the CPU. Would it be OK to replace them with something like EEUFR1A332 ? (Panasonic FR 3300µF 10V). Or was this board designed around very low ESR caps?

                    But I was also suprised about the bigger boys, which are 330µF 25V.
                    Could it be they used 25V caps because they were cheaper / available at that time?...
                    02-11-2025, 12:22 PM
                  • Loading...
                  • No more items.
                  Working...