Re: LG 42pq3000 just backlight
thats what i thought so god knows what it could be
thats what i thought so god knows what it could be
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Re: LG 42pq3000 just backlight
Probably the main processor -- most likely needing a new board unless you have a scope to trace through everything!
People have the boards for sale for about £50.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42pq3000 just backlight
so there is no other tests i can do on the board at allComment
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Re: LG 42pq3000 just backlight
Cant make out much on your picture - is that a reset button? have you tried pressing it?Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: LG 42pq3000 just backlight
yes ive tryed pressing that button its still the same,any other tests would be well appreciated. could it be the cable between the 2 boards main-controlLast edited by steve2k34; 02-02-2013, 10:55 AM.Comment
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Re: LG 42pq3000 just backlight
Try holding MENU on TV plus MENU on remote at same time.
Doing the auto gen has ruled out all boards as good, except the main board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42pq3000 just backlight
Do you have a known source connected dvd playing is good.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: LG 42pq3000 just backlight
no matter what source i put in i cant get sound nor change the imputComment
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Re: LG 42pq3000 just backlight
i pressed and held menu and it came up hdmi 1 no source on screen then dissapeared againLast edited by steve2k34; 02-02-2013, 11:03 AM.Comment
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Re: LG 42pq3000 just backlight
What? Show us? You get an OSD?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42pq3000 just backlight
and its brought some menu up now looks promisingComment
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Re: LG 42pq3000 just backlight
Pictures, or it didn't happen
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42pq3000 just backlight
this is what comes upAttached FilesComment
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Re: LG 42pq3000 just backlight
Well, damn, that's surprising. You get that faint static on most inputs though? A good portion of the main board is working if you can get OSD.
Try and see what's under SYSTEM CONTROL.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42pq3000 just backlight
does not seem to respond to change the imputsAttached FilesComment
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Re: LG 42pq3000 just backlight
OK, I don't see a reset there, you'll need to look through all of the menus and try and find a reset option.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42pq3000 just backlight
the only reset i saw was under panel options reset panal used time but that dont make any differenceComment
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Re: LG 42pq3000 just backlight
wtf i just pressed something else to get into hotel mode and its working now fingerss crossed it will stay on will keep you informedComment
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Re: LG 42pq3000 just backlight
Hotel mode usually restricts some options.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 42pq3000 just backlight
yeah i only got that menue up for some reason then done a factory restore and its ok all imputs work now even tho its not the best of picturesLast edited by steve2k34; 02-02-2013, 12:18 PM.Comment
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this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even... -
I bought this p2210f dell monitor to fix. Schematic is the same as p2210.
Behaviour is that monitors comes on but then backlight switches off almost instantly. If I look with flashlight I can still find the "No signal message". So definitely a backlight issue. Trying to advance the issue I proved that the protection circuit is switching off the backlight by shorting out C3 and resistor to disable the INL chip then re enable by removing the short.
This is where it gets interesting. When I disassembled the monitor to solder leads on c3 capacitor I noticed the backlight flickered... -
Hello all,
Am trying to figure out this backlight issue with this A1990 Macbook Pro.
Tests performed:
There is no backlight even with a good screen.
Backlight IC is receiving the correct support voltages.
Fuse F8400 ok
Current sense resistor R8400 ok
Backlight IC is receiving 3.3V on enable pin.
Backlight IC receiving voltage from PPBUS_G3H, aprox 12.5V.
Backlight IC receiving 5V from PP5V_G3S
Backlight IC BKLT_SCL and BKLT_SDA both measure 0.545V diode mode to ground
I2C_BKLT_SCL and I2C_BKLT_SDA both measure... -
Hello, got an iPad Pro A2378 12.9 5th gen with no backlight. Got another test unit without screen, tested the screen, still no backlight with the test unit.
Figured out the backlight on the screen was bad, ordred a new backlight from mobilesentrix, *carefully replaced it* without damaging the lcd, oh well.
Final result, issue is still there, the screen has no back lights. So i'm back to square one, with 3 hours less and 100$ out, issue still on the screen.
The panel is still ok, i can see the apple in the middle of the screen when it kicks in, just no backlight.
Anyone... -
Hi all,
I've got an LG Flatron 24EN33TA with a backlight issue. The problem began with the monitor not powering up after sitting for a long time (overnight or during the day throughout work). When I would wake the computer up, the backlight would flick on for a second then go out. Sometimes it would take many tries to get it to come on. Once the monitor came on, it worked flawlessly until another long duration of being powered off.
I thought the problem would be bad caps but I checked both of the caps on the board and they are fine. I also tried powering the monitor from...
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