Re: ViewSonic N2750W - 0 secs to black
Instead of messing with it I bought an inverter board from shopjimmy for $20. So far I would have replaced 3 bad caps on the main board and the inverter board. If this doesn't do it does anyone want a TV?
zedron
Member
Last Activity: 07-14-2014, 07:31 PM
Joined: 07-05-2014
Location: Tampa, FL
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Re: ViewSonic N2750W - 0 secs to black
Tiny caveat. It does read 0F for loop. I was stating 0 as it was giving a reading of no Ohms/No resistance but thinking in my head open loop. Sorry for the confusion.Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
RadioShack T-RMS DMM #2200075 it is new less than a week.
Now that you suspect that the meter may be faulty I tried my other meter and obtained similar results.
Commercial Electric MS8260A
I can post pics of the display when I take pics of the board later this evening.Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
Yep positive.
0
Once I touch them together it goes to .1 Ohms
I sent an email to jimmy regarding the part number to verify. While I have been here on the site I have been lurking around and noticed that too with regards to incorrect item purchases. That's what prompted me to email them for verification....Last edited by zedron; 07-11-2014, 01:22 PM.Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
Meter reads 0 when leads are apart
Meter reads .1 Ohms with leads together
Meter reads .1 Ohms testing "good" fuse
Meter reads 0 or bounces around and eventually ends back at 0 on "bad" fuses
Nothing on back.
Ill get some updated pics later this evening.
shopjimmy has a board for $20... :-/Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
Any suggestions for locating that or easier to get a new board?...Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
Got it, thanks.
Im going to go ahead and say that 3/4 fuses are shot. Im going to replace all 4 though since I am already in there. What kind of fuse would that be? There are no markings on it except the amperage rating....Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
Ahh I see what you mean. Whats the best way to check fuses, continuity? Forgive me if my questions are rather simple. Im in no way a electronics person but rather a network/voice engineer, lol.
Thanks for the reply. Checking fuses....Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
Unfortunately the cap replacement did not solve the issue. I checked the output from the PSU to the inverter board and it read 23.06V. I'm going to guess it a CCFL or something with inverter board. Anyone have any ideas to check? I don't have any CFLs lying around either or a CCFL tester. I was thinking about buying one of those CCFL tester on eBay for $6 to check and to keep in my tool box for other projects.Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
Pulled the caps out and tested.
The 1500 uF caps tested around 450-600uF
The 1000 uF cap tested around 200uF
I looked on the inverter board for F fuses and the only ones I found are F1-4 but they are empty.
Im gonna buy some replacement caps and see how she does.
Ill post back my results.Leave a comment:
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Re: ViewSonic N2750W - 0 secs to black
After looking over the boards some more thinking that it cant be this hard I noticed three caps on the main board looking a little bloated.
(2) Elite 1500uF 10V 105C
(1) Elite 1000uF 16V 105C
Survey says?...Last edited by zedron; 07-05-2014, 07:57 PM.Leave a comment:
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ViewSonic N2750W - 0 secs to black
Someone was going to throw out a ViewSonic N2750W but I said Ill take it and give it a shot at repair. We could always use another TV somewhere in the house right? My last attempt at Tv repair was very successful so I said why not. I have nothing really to lose besides maybe a few bucks in replacement caps, etc.
TV turns on and I can see the image in the back with a flashlight. I didn't hook it up to an input source but instead hit the menu button to get the OSD to appear and it does with a flashlight of course. So, I said OK, cant be to hard of a problem. Just got to get those back...Last edited by zedron; 07-05-2014, 07:27 PM. -
Re: New Members - please post your introductions here
Hey,
New here. A friend asked if I wanted a TV that didnt work. I said sure why not Ill give it a shot to fix it. if I cant fix it, no big deal.Leave a comment:
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