Re: LG 46LD550 won't turn on/no video, sound
Japanese Transistors:
2SA, 2SB = PNP
2SC, 2SD = NPN
Japanese Transistors:
2SA, 2SB = PNP
2SC, 2SD = NPN
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: LG 46LD550 won't turn on/no video, sound
Thanks. I didn't notice that.Comment
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Re: LG 46LD550 won't turn on/no video, sound
And,
2SJ = PMOSFET
2SK = NMOSFET...
Full list:
http://en.wikipedia.org/wiki/JIS_sem...or_designationPlease 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 46LD550 won't turn on/no video, sound
In the x06 series bad caps were causing ripple on the regulator feeding the eeprom sometimes causing corruption and ??? To appear in the eepron version in the display.
I can get an 807 local for $60 but it may need a reflow of the dts chip but reball is better and I don't have the tools for that. Still debating.
Sorry to take this topic OT btw lolComment
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Re: LG 46LD550 won't turn on/no video, sound
I actually do have a question, does your mainboard have a LED status light what color does it illuminate when you turn it on or apply power? your LG lay out is very similar to the 42LH50-UC unit I am currently trying to figure out!Comment
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Re: LG 46LD550 won't turn on/no video, sound
I have already sold the TV a half a year ago, and I don't remember if it had a status LED. Sorry about that. You should ask this question, in the other thread.Comment
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Re: LG 46LD550 won't turn on/no video, sound
Has anyone figured out what is failing on these LG Main Boards? I hate to buy a 'new' used board to have it just fail again in two years.Comment
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I am facing a strange issue, I don't have any sound over my internal MacBook speakers and also the video won't start. If I change to my head speaker or via HDMI (speaker on my external Display) the sound works over the head speaker or Display and also the video starts (ex. youtube).
All happened after the battery ran out of power overall several days when I was on vacation.
I tried to remove the battery and then reconnected the battery, and then the MacBook Pro 14 2021 won't accept any power from my power socket. Then I removed one speaker, connected again the battery... -
When I select the FM receiver, I find a radio station, the sound is heard on REC OUT(L,R), REC TAPE1(L,R),REC TAPE2(L,R) on high-ohm headphones, the sound regulation does not work.
The output reacts when I connect the record player to PRE OUT FRONT L, the sound is heard in the speaker but the sound regulation does not work. Then it does not matter what I chose on the front selector.
I replaced the capacitor C303/0.047F, nothing changes.
I'm asking for help, what should I do next?
Thanks in advance!... -
Good morning everyone,
I'm trying to repair an onkyo ht-r390 that has no sound output, despite the volume being at maximum, the rest seems to work; the video output signal (coming from an hdmi input) is present, but the audio is absent. Similar situation if I send an audio signal from any input I have no output.
The firmware reported is the following:
M:1.00/11107BLP
D:?.??/????????
O:1.00/11107AL
The DSP firmware given the question marks seems corrupt.
On the BCHDM-0678 - 25140678 - QPWBCHDM0678A0 board the chip that usually seems...05-11-2025, 02:59 AM -
This specification for the HP EliteDesk 800 G3 + GoPro HERO6 Black 4K Ultra HD Video Camera can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the EliteDesk 800 G3 + GoPro HERO6 Black 4K Ultra HD Video Camera boardview and EliteDesk 800 G3 + GoPro HERO6 Black 4K Ultra HD Video Camera schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our...09-12-2024, 02:00 PM
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Good day ladies and gentleman!
I am currently trying to repair a Grundig Vision 9 37 9880 T USB LCD TV for a friend that has a weird audio problem. Basically everything works fine except for the heavily distorted sound when the Subwoofer module is connected and there is a buzzing sound coming from the PSU PCB.
This seems to be a rather rare TV so there is not much prior on topic help to be found however a service manual is available at the usual sources (Electro Tanya i.e.).
I think the PSU buzzing comes from one of the coils near the bridge rectifier but...
Comment