Does anyone have a schemtaic for the motherboard in this TV? Thank you
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Re: Schematic for LG 55UF6450 TV
That says it is repair service for snowy picture. I don't have that issue. My issue is that the inputs don't work. I can stream my phone through tv and it works fine, but if I plug any hdmi inputs in nothing happens.Comment
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Re: Schematic for LG 55UF6450 TV
You are not going to repair a TV main board yourself even with a schematic. Main boards are multi layer with small and fine pitched components like computer motherboards. I am assuming you don't have specialized equipment or skills to do component level repair but asking for a schematic is a sign that you don't. You can ask the seller if he repairs your problem or buy a new main board. These boards usually have bga issues which require reballing. You can try heating the processor with a hair dryer before plugging in.Last edited by neilc6; 12-13-2022, 06:58 AM.Comment
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Re: Schematic for LG 55UF6450 TV
maybe we can muddle thru, what are your symptoms?Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Re: Schematic for LG 55UF6450 TV
When I plug HDMI stuff in the tv doesn't recognize that anything has been plugged in. I do have access to high end equipment. My friend works at an electronic manufacturer as an electronics repair tech. He asked me if I had one so I thought maybe someone here might have the schematic. I've tried many times to buy a new board. They are always either sold out or charge insane amount upwards of 250$. Seems like they are actually worth about 90 to 100$. The only repair service I could find on ebay was for a snowy pictures. Thank you for the replies
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Re: Schematic for LG 55UF6450 TV
something simple to try just in case, unhook all hdmi cables, turn off tv, unplug tv from power, press and hold power button for 30 seconds, plug hdmi cable back in, plug tv power back in and try it, if no joy maybe a factory reset will work if you haven't yet tried it, I assume you already tried a different hdmi cable.Last edited by nomoresonys; 12-13-2022, 03:39 PM.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Re: Schematic for LG 55UF6450 TV
That repair listing also lists black screen with sound and backlight.
I would suspect its a problem with the solder balls under the processor in the middle of the PCB. Ask your repair tech friend if he does BGA rework, if not, consider the repair service if neil6 has used them before.Comment
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Re: Schematic for LG 55UF6450 TV
Post a pic of the main board. If you're lucky it has a separate HDMI chip which may have failed and can be replaced.Comment
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Hey everyone,
I'm currently working on a mid-70s Sharp Electronic Digital Clock Radio, Model FY-70CH. I found the service manual online, printed it out, and have been studying it for a while. My main reasons for tackling this are: (1) I want to learn electronics and figured I'd start with something I had on hand, and (2) I want to fix its issues. Right now, the radio sounds awful, has about 5V DC at the speaker terminals, and the alarm time setting doesn't work. But I'm not asking how to fix these problems.
Instead, here's what's been bugging me so far:
The schematic... -
Ii wonder if anyone can help me. I have a Acer x163w monitor which is not powering up. The PSU main capacitor's one leg had completly come off - I replaced it but the PSU is still not outputting DC. I found the monitor in questions service manual here on manuals lib but the schematic in there is a completely different - the schematic shows no mosfet to drive the transformer while the one I have does use a mosfet - also the schematic shows only one optocoupler but mine has two.
The PSU board is labelled FM-20A02-AAA made by APD as per the image below. I am trying to find a schematic for this... -
Hi guys, I'm working on a MSI Ventus RTX 4080 16G. The GPU has 12v, 5v, however what I assume is the 1.8v rail has 1.1v and what I assume to be PEX is 0v. As you may have guessed already there is no Vmem and no Vcore.
I have looked around in related forum posts for a schematic so Much appreciated if anyone can share a Broadview schematic.
Thanks. -
Had one of these come in for repair with a blown battery and a WiFi issue, battery has been replaced with genuine battery (twice) and won't take a charge works fine on AC, WiFi issue gone away. Looking for a schematic so I can trace the charger circuit UM562F is only one I can find, this is the 562AI model.Had a unit come in for repair — 562AI model — with a blown battery and WiFi issue. WiFi fault has cleared, but battery won’t charge despite replacing it twice with genuine parts. Device operates fine on AC power. Suspect charger circuit fault. Only schematic I’ve found so far is for...06-26-2025, 02:41 PM -
Please help, i need schematic diagram for Dell inspiron 3537 board LA-9982P rev 3.0 (A02). Specific for A02.
I have a one beep with no display problem. Did reprogrammed the bios but no luck. i tried to troubleshoot using rev 3.0 (A08) version schematic and boardview but there's components/rails in the schematic that is none in my actual board, this is why I'm having problem checking every power rail needed if ok. attached is the photo of my actual board.
I'm not sure if A02 and A08 is really different schematic version from each other, but I have to try....
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