Hello, im new here but I've dealt with bad caps on MBD's before (ex-gateway tech support). Im trying to fix an NEC 17' LCD display that wont start up and simply just blinks the sleep light on the fron VERY FAINTLY whenever you try to power it on. So i pull the thing apart and lo and behold, there is a cap on one of the boards thats bulging and oozing out of the top. In your informed opinions, do you think this could be the source of the problem?
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What brand is the cap? The cap may be the source of the problem. However, it might also be the aftermath of shorted regulators or something else that caused it to blow.
I've never even seen the inside of a LDC monitor, so I can't speak too intelligently on how they work. Post some pics.<--- Badcaps.net Founder
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very common.
i have an nec with choyo 330@25 caps blown up.
yes the same crap gigabyte puts on mobo's.
change them out and it wil be ok
btw tc many lcd run from 12v dc and use buck converters to get +5 +3.3 ect.
the ccfl driver runs from raw 12vComment
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well the bad caps are labeled as "Elite", dont know if that is the manufacturer, the monitor is an NEC MultiSync 1720M, and the 2 bulging caps are both 1000uF and 35v and 16v respectivly
unfortunatly i dont have a digital camera that works right now otherwise i would post some pics.Comment
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Re: Bad Caps in a MONITOR?
I can confirm. In the two NEC MultiSync LCD1720M monitors that I repaired, there were actually 3 of these guys all in the same area - two were 1,000uF at 16V and one was 1,000uF at 35V. They were all "domed" on the top and one had electrolyte that leaked out. Did not take any pics unfortunately. They were radials. I replaced all three and that did the trick for both monitors.
BillComment
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Re: Bad Caps in a MONITOR?
Hi there - I'm so glad to have run across this thread. I unfortunately am not on the technical side, but do have the same if not exact symptoms/issues explained here. Would you mind possibly giving me a step by step guide to fixing my monitor like you did? Where can I buy these caps and how much would/should they be?
Thanks a bunch!!
RonComment
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Re: Bad Caps in a MONITOR?
Elite are junk and common in LCD screens. - Just replace them.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Good day!
I have a Samson Resolv studio monitor that has no sound output. I've opened it up and found two caps that are bulging on what I believe to be the power supply section of the amplifier board. The board is marked Resolv 65A AMP V1.2. The caps in question are YUSCON, 2200uF, 35V, 85C temp and have markings of RA(P) and are 16mm x 25.5mm tall. I've attached the schematic and the caps in question are C5 and C6. I'm assuming they are low esr caps. I've tested both caps and they test low uF, nowhere near 2200uF.
I'm going to replace the caps and I'll be the first... -
Normally, I never post repairs this quick after I do them, because… I am usually very slow.
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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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... -
Here's another LCD monitor repair: Westinghouse L2210NW.
Quick specs: 22” CCFL backlit LCD, 1680x1050 max resolution (16:10 aspect ratio)
I got it with a bunch of desktops PCs from a repair shop that was trying to free up space a few years ago. It seemed like a cheap monitor, so I didn't really care that much at first when I picked it up (and indeed it is, picture-wise.) But hey, free is free, so I can't complain. Moreover, it looked clean and the screen didn't have any significant scratches or blemishes.
Pictures of the monitor outside/case after a brief... -
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."
...
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