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Re: HP w2007 white screen problem
No, unfortunately, I wasn't able to determine the value of the shorted ceramic cap, so I just replaced it with one of the same dimensions that I cannibalized off of a dead video card. I know that's not exactly the best approach about fixing things, but I figured putting in any ceramic cap in there should be better than leaving the spot unpopulated. I did this with two monitors, one of which I've tested for a couple of days and it's been working fine.
My guess is that you can use the AAT1164C datasheet (if you understand it). There is a section on page 16 of the datasheet that talks about the output capacitor, but unfortunately I'm not that advanced in electronics to understand it. However, the datasheet does give a typical application circuit on page 14, which calls for a total output capacitance of 47uF (C3) when the main boosted output voltage (Vout1) is 13.3v @ 300mA, and the inductor is 6.8uH. I'll speculate that as long as you stay somewhat close to this capacitance, that circuit should work. Since there are 4 ceramic caps on the main boosted voltage rail of your monitor, that gives you about 13uF per cap more or less. So look for a10-15uF multi-layer ceramic cap with the same dimensions.
Of course don't change those ceramic caps unless you've found that one of them is shorted.Last edited by momaka; 12-29-2010, 10:23 PM.Comment
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My asus laptop motherboard la-7322p has white screen. Have tried new screen but same problem.lcd vdd is 1.8v when i removed the mosfet an short 3vs with lcdvdd white screen is solved but no data on screen... -
As per subject, on power up display shows no image, but white
flickering screen. Strangely, it only happen after power was lost
when it was on. After power returns - white screen only, but if
disconnect power for 12-24 hrs, and connect then again monitor
works normally.
Any clues how to go about it would be greatly appreciated. -
I have an HP model : 14-cf0011nf and I want to change its display screen (it has an original 14" full HD TN 30 pins panel) which works without problem but I want to put another screen with an IPS panel, the problem is that I tried several screens but there is no display except with the original screen, I never had this problem before I changed hundreds without problems but this PC is not 'accepted than its original screen
otherwise on the motherboard it displays edp and I don't know, do the panels I tried only work with the LVDS protocol?
If anyone has any information on the subject... -
I have a Dick Smith 37" LCD TV, Model GE6804. I am using it as PC extended monitor only.
Problem is while watching tv, I hear a semi loud click(like a electrical breaker tripping due to overload, just sound like it but no actual electrical overload), then screen is covered with green or pink. I can still see the original picture image but overlayed by green or pink. See attached images. Pink.jpg is what I see, and Normal.jpg is before green or pink screen, What I captured was pink screen, but about 80% of time it's green and 20% of time it's pink.
Then each time... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
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