Re: hp w2338h issue
I replaced both of the double connectors with four single (standard) connectors. I have the lamps wired up with jumpers right now, not soldered, to allow me to easily switch the lamps around. Could that be causing a problem? I didn't get a chance to work on them last night, but I plan to do some testing tonight. However, I don't think it's the lamps as I can swap them around and the result is the same. Is it possible that the new lamps have a different rating than the originals, therefore the inverters are sensing something out-of-range?
I've got...
Xwell
Member
Last Activity: 06-24-2015, 07:45 PM
Joined: 11-08-2011
Location: Ft. Worth, Texas
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Re: hp w2338h issue
Four newLeave a comment:
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Re: hp w2338h issue
OK, I got the 520mm lamps in yesterday, and they are very close, maybe a millimeter or two long. But now, when I have all four lamps wired in, I get two that light brightly, and two that are a bit dimmer. they appear to attempt to come up to full brightness, then they all go out. I need to do some swapping around to see if I can pinpoint the issue.Leave a comment:
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Re: hp w2338h issue
Here's a closeup of the connector...Leave a comment:
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Re: hp w2338h issue
Good Morning,
I just went through the same issue with the same monitor. The unit would shut down after a second or two. It produced a easily audible buzzing, and a very noticeable stench. Upon opening the monitor, I found that there was arcing from the CCFL inverter connector (attached to the CCFL). The current was so high that it melted a hole in the connector, followed a path back out of the receiving connector (female, mounted to the power board) and was shorting to one of the grounding pins.
I disassembled the LCD panel...Leave a comment:
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Troubleshooting - Flow Chart Question
Good Evening,
I'm attempting to repair an LG Blu-Ray player that will not power on. I have found a service manual that provides a flow diagram to test each of the various voltages as they are passed from the power board to the main board. My noobie question is, "What dies it mean when it asks if a pin is H?" I've attached the particular diagrams, with the second sheet being the one I need help with. I have good voltage on the 5.3V pins.
Thanks for any help you can give,
Xwell... -
Re: p42hdtv10a - No Picture, No Sound
Update...
I got the new IPM installed, the board back in place, and BAM! the screen lights up. So I hook up a dvd player via HDMI and get video. Hmmm.. still no sound (which doesn't upset me too greatly, it's going to be used as an A/V monitor anyway), so I hook up a set of RCA cables from the DVD player to the audio inputs on the TV. Still nothing. And still not a big deal. Heck, I paid $75 for this TV, along with a Sony GPS unit (working), and a Casio digital camera (which I sold to a co-worker for.. wait for it... $75) so...Leave a comment:
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Re: Blue ESR Meter came in very handy over the weeken
Or here:
[url]http://www.flippers.com/esrktmtr.html[/url]Re: Blue ESR Meter came in very hand...mtr.html[/url]Leave a comment:
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Re: p42hdtv10a - No Picture, No Sound
Thanks, I was careful not to make contact with any of the surface mount components. I did scratch some of the enamel off of a ground pad, but I covered it with fingernail polish.
I did find a short between the +18v mounting hole and ground. Turns out it was the C29 cap next to the bank of larger caps. It was very loose, and wiggling it would make or break the short. I desoldered the inside leg and the cap came off of the board. Looks like that leg was broken. The short is gone between the +18v and gnd holes, but I am getting...Leave a comment:
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Re: p42hdtv10a - No Picture, No Sound
OK, I had to resort to a hacksaw blade to get the IPM off of the board... Even then, removing the pins left behind was quite a chore. It felt like these things were pressed in! Once the chip was out, I tested and found a short between the sus_out and ground pins. That's a good sign.
I've received the replacement, and before I attach this one, can anyone recommend any further tests that I can do? Rpgruss, I have powered the TV on without the Y-SUS board and it appears to power up successfully. Still no sound, and no picture (obviously)....Last edited by Xwell; 02-16-2012, 07:41 PM.Leave a comment:
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Re: p42hdtv10a - No Picture, No Sound
Thanks for the info. If I do remove the IPM, can I put the Y_SUS board back in circuit to see if I can power the set up without the protection shutting it down? If so, is that a pretty good indication of the IPM being the culprit?
Thanks again!
XwellLeave a comment:
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Re: Vizio p42hdtv10a - No Picture, No Sound
OK, I found something interesting. When a continuity check on P1, it's showing a short across the ground pins and the Vs pins. I show a short to ground when I check the four Vs pins on the hybrid, as well as the four SUS_OUT pins. If I pull that IC, is there a schematic or a test plan to allow me to validate that the short is being caused by the hybrid?Leave a comment:
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p42hdtv10a - No Picture, No Sound
Hello All,
Long time lurker, first time poster.
Thanks for a great resource for people like me who don't think a marketplace built around "disposable" goods is such a good thing. Then again, I suspect most hoarders believe the same thing. Boy, don't let my wife know of my realization....
I've had this set back-benched for a while now, and I've made a promise to myself that I'd concentrate on getting it working (or proving that its beyond repair). I've followed a few of the posts on this forum and think I have narrowed... -
Re: New Members - please post your introductions here
Hello Everybody,
I've been lurking around Badcaps.net forum for a while now. I finally joined late last year (when I needed to view some photos), and now find myself needing help with a project that has been back-benched for almost a year now.
I consider myself a hardcore amateur, I can take anything apart. Sometimes getting it back together, well that's another story....
I have no formal training, have a BASIC understanding of component level electronics, and I'm fairly proficient...Leave a comment:
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