Re: Hyundai L90D+ inverter mosfet problem
I replaced those caps with 25v, 330uF's. Problem remains.
I also noticed that when I first turn the monitor on, the backlight flickers for only a quick moment. I didn't notice it until I turned the lights off in the room.
After turning it on and off many times to observe this just now (about a dozen+ times), the monitor turns off once it attempts to power up the backlight. If I give it a minute, it will stay on again. I don't know if this means anything?
Knowing this, can I pinpoint the culprit?...
camra88
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Last Activity: 01-10-2011, 06:05 PM
Joined: 12-23-2010
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Re: Hyundai L90D+ inverter mosfet problem
[U]Results:[/U]
[B]all caps and Q's are not short circuited. Including C22 & C52. [/B]
[B]All resistors are within tolerances[/B]
[B]All diodes? (D's) also pass this test, except for 2:[/B]
D14 and D16 (to the left of the 0Z960SN) -- i get a reading of 98 ohms across the two legs next to each other. They are the legs connected in parallel to a 390 ohm resistor (according to marking 3900).
I find this low, considering measurements taken off similar D's: D10 and D11 (they...Last edited by camra88; 12-24-2010, 10:49 PM.Leave a comment:
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Re: Hyundai L90D+ inverter mosfet problem
I do not have any sunlight currently to take good pictures, hopefully these will do. There are 2, hopefully you can make out everything in the area.
Other than replacing those caps, what else could the problem be?...Leave a comment:
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Re: Hyundai L90D+ inverter mosfet problem
1) The capacitors appear to be GF series. They read:
GF (M)
TOA
105*C8
2) I'm not quite sure what you mean by the area highlighted in yellow. I'm assuming your talking about the transformer? See attached image.
3) The backlight IC driver is indeed 0Z960SN....Leave a comment:
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Re: Hyundai L90D+ inverter mosfet problem
I have taken the pictures. See attached.
The back light wont even turn on when I cycle the power to the monitor. Either via power button, or unplugging and plugging back into the outlet.
I put the monitor back together to test this, and the problem still persists.
What's my next step?...Leave a comment:
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Re: Hyundai L90D+ inverter mosfet problem
The one closest to the center of the board is the +12 volt supply. The one nearest the edge is +5 volts. It appears both are working correctly.
Is there a ghost in the monitor or something???Leave a comment:
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Re: Hyundai L90D+ inverter mosfet problem
Is there a way to measure that with out the risk of death?Leave a comment:
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Re: Hyundai L90D+ inverter mosfet problem
My problem is that the backlight just won't turn on. When the computer is in standby, the monitor's LED turns orange, as usual. When it gets a picture, the LED turns blue, as normal.
I have tested the both of the dual-MOSFET APM9932 packages, and the lowest resistance reading I got was ~20k ohm. According to previous posters, they "pass the test."
Next, I closely examined every capacitor I could find on both sides of the board ("FeeLux", power board) and was unable to visually identify any potentially...Leave a comment:
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