Hi, I've just this tv in for repair. Turn the TV on and get a red standby light. I press the power on from the remote. The TV turns on and HDMI comes up in the left hand corner for a second. The a small display pops up saying 'No signal for current input. Try other available inputs'. I try to use the remote but nothing happens. When you touch the buttons on the tv it shuts down. I tried VGA and scart and its the same. So i'm 90% sure its the main board that's fault. I tried heating up the board but that didn't work. Then I read about changing the HDMI controller IC should fix it. I had no idea what I was looking for, until yesterday when on a video a guy pointed it out. So I took out the chip today and turned on the TV. It was the same fault. Does that mean I am right? The chip reads LGE40RC-LF, A5MFF90B, 1135B. Problem is I can't anywhere to buy a replacement chip, except China! Any ideas if I am right about the chip and about sourcing parts in the UK. Thanks.
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This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.
There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as... -
The bq24745 bq24745RHDR bq24745RHDT is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. The input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus interface. The bq24745 charges two, three, or four series Li+ cells, and is available in a 28-pin, 5-mm x 5 mm QFN package.
The bq24745 features dynamic power management...10-23-2024, 02:50 AM -
Common SPI bios chip programming Questions and Answers
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Q: I have a bios request,i can`t post my backup as i can`t read from the chip.
A: If you can`t read from it how do you expect to write to it ?.
Q: Why is my bios chip unreadable ?.
A: The programmer is faulty or has a worn or broken zif socket.
The USB cable is frayed,connector pins worn or some other physical damage.
Not enough amperage or voltage to power the programmer properly.
Bad...09-02-2021, 04:40 PM -
Anthem MRX500 - no sound
Dear Electronics Experts:
I have the following problem I am trying to troubleshoot. Unfortunately, I have contacted Anthem themselves and even a local distributer but I am not having much luck. Also, I have scoured the internet and unable to obtain a service manual. The Anthem service rep has also replied that he is unable to provide me with any service documentation. I have performed numerous searches on the internet and cross-referenced a few other AV receiver makers (Denon, Marantz, Onkyo) and found certain similarities to block diagram... -
Attached schematic 🙂.
Laptop gives no signs of life. No fan and no CPU heat.
Think Engine BD4179MWV is hot on plugging in *AND* pressing the power button.
Discovered short to ground on VCC5M power delivery IC NB690GRP (5 volt line, not the high current VCC5M_PD) which is one of the ways that chip is powered. I'm puzzled.
Nothing else is warm on the board. CPU resistances are OK, 9V VSYS line is present from the BMIC. All misc and cables are disconnected.
What do you guys think happened? I've got two theories:
If the...I think ThinkEngine shorted first50.00%1I think 5V SMIC shorted first0%0I think something else happened50.00%1