Re: HP LP3065 Not working (Flicker, noise, patterns)
Hi, Thank you for your information.. I was starting to feel like it was a lost case by now.. However I did some more test like you suggested with a heat gun on the components of the T-con board.. When I did this on the big chip I did notice some changes on the screen.. I did even at some point get it to show parts my desktop image for a while and pressing on the chip itself also had an effect on the image. So it appears as if the 'LG.PHILIPS LCD KE5M3U1995' is defective in some way. I have looked at all the solder joints and they...
antome
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Last Activity: 06-25-2013, 03:11 PM
Joined: 03-25-2013
Location: Stockholm
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Re: HP LP3065 Not working (Flicker, noise, patterns)
All 000 rated resistors measure as close to 0 ohm as my meter will go, so they are ok. I tried to listen while powering it on again but I can not tell for sure if the noise is coming from the inductors (L1, L2) or not, but it seems likely. I also hear like a small "ticking" noise from the same area.Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
... and I tried to clean the flat cables like you said but with no result.Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
OK, I measured all the FL's and the fuse and they seem ok. I also checked the voltage before and after the fuse and it was 17.8 V o both sides.
While having the monitor turned on when I checked the voltage on the fuse I noticed that the high pitch noise is actually coming from the T-con board. It is however not a constant noise, it changes depending on the "pattern"/flicker that is on the screen at the moment.
Maybe that can indicate something?Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
Ok here are 2 pictures of it. It does have 4 cables going to the panel and I have tried to disconnect/connect those before.
I did find one fuse on it (F1 - 63V - 2A) that you can see on picture 2 near the bottom close to the connector. I also found a lot of FL's (like ~20 of them). I have not tested any of those. I don't know how I would test them, please explain. I guess I should be able to measure the F1 just by measuring straight across it with a low resistance setting? But can I do so safely without first desolder...Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
Yes, I just tried that. The LED will stay on green and the screen will flicker like it did before.
Are we maybe looking at a broken T-con board? I imagine that it would be hard (if not impossible) to fix that on your own...?
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Re: HP LP3065 Not working (Flicker, noise, patterns)
Yes!Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
When I disconnect the LVDS cable nothing happens when I turn I on. The screen just stays black. The green LED comes on for about a second and then turns orange, indicating that the monitor is in sleep mode.Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
Yes of course a lot of SMD caps, but those seems to be alright.. Just to be clear, you mean disconnect the cable going from the motherboard to the T-con board and not the flex cables going from the T-con to the 'panel' ?Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
I have disconnected and reconnected all cables (I think) so I dont think the connections are bad. Unless the connector or cable itself is worn or broken is some kind of way. Or even broken solder joints perhaps... I will take a closer look at that. Any info on testing the voltage regulators?
The monitor does not have an on screen monitor actually. Only input switch and brightness adjustment. Nothing happens when I press them.Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
If it is capacitors that you are looking for then I can tell you that the T-con board does not have any capacitors either. I looked at it before when I did my own "looking around". However if you want me to take a picture of it anyways then I can do that!
I find it kind of strange that the ccfl could be the issue.. Why would that affect the image like this? If the backlight itself was flickering wouldn't that affect the brightness of the display rather that affecting the "content" that is displayed?...Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
Ok, So if I were to check for a burt isolation at the ccfl would I have to take apart the whole panel?
I have tried to disconnect the cable bewteen the main board and the
T-con board before with no result. I have taken some photos of the inverter board that I will attach below. If you need photos of the T-con then I can upload some also, but that board is a pain to get out....Leave a comment:
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Re: HP LP3065 Not working (Flicker, noise, patterns)
Selldoor: I have had it since it was new so it was not faulty to begin with.
klkmalik: The ccfl lamp cables seemed to be connected just fine. I don't know what you mean by inside arcking? And regarding the possible T-con board issue, do you have any suggestions on how to proceed to troubleshoot that?Leave a comment:
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HP LP3065 Not working (Flicker, noise, patterns)
Hello,
I have a HP LP3065 30" monitor that is broken.
I have tried looking around for other threads with a soltion for this for a while now but have not been able to find one.
Whenever I turn it on it just starts flickering like crazy and I sometimes hear a high pitch noise. When it first started to happen it would only flicker whenever it had been turned of for a long period of time, but now it is constantly flickering (or making random patterns that changes depending on what the computer is trying to display).
I have opened it up and looked at...
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