any recommendation on purchasing a replacement sv420m mainboard?
Read of all the messages on this vizio tv in this forum, seems best bet for my repair is a new working sv420m mainboard. the symptom just like bigkerrdogg mentioned in the forum. +12 is present upon plug-in. led in amber all the time. no response to power-switch. Power-board tested good. any ideas, suggestions are welcome.
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Hi everyone,
I've got a little "problem child": my Dell Latitude 7420 2-in-1, which had a faulty mainboard.
I replaced it, but ever since, the touchscreen no longer works — and honestly, I’m running out of ideas…
In Windows Device Manager, I just see an I2C HID Device with error code 10. Sporadically, the touchscreen is recognized correctly for just a few seconds, but I haven’t been able to determine under which circumstances this happens.
The touchscreen also doesn’t work in UEFI/BIOS, although it’s enabled... -
Hello,
I am looking / wondering if anyone knows where a good firmware download link is for a LC-60LE640U, the sharp support sight says the screen is archived but offers no links.
I see backlite is active,
but I cannot get the screen to return back to menus , etc
This is all after replacing the mainboard...
any assistance is greatly appreciated. -
HI guys
just quick question,
I just fixed a dead Sony 55x800h, I replaced with a 65x800h board
now works everything seems ok
except that after factory reset, it will show 65x800h on the name,
screen is 55 inch now
I am guessing the size of the tv is programmed on the main board right?
I could just change the name only
or any way to flash the chip to make it to be a 55x800h instead?
thanks... -
Hello,
I have an old MASTER TL-240 LED TV. Since it stopped working and it had a DVB-T receiver that is being dismissed in Italy, I've decided to replace the mainboard with a DVB-T2 one.
The original problem was that when switching on the TV, the power LED was transitioning from red to steady blue, without showing video or audio.
After checking some voltages on the power supply board (HKL-240101-B Rev. 1.4, HKL from now on) someone suggested me to replace the mainboard.
Now I have some doubts about how to connect the new mainboard to the old power supply.
First of... -
Just had a customer bring in a M2 MBA A2681 that had had a screen replacement in April at another repairer. Since then, she has been getting intermittent kernel panics. It's an aftermarket screen, and of course it fails in diagnostics as the calibration hasn't been done. The error in the panic log is "No device added after powering on the rails".
It seems the original repairer has swapped the board and the screen to other MAC's, and said that it isn't a screen issue. From what I understand, by doing a quick search on Google, this is in fact a screen issue. The panic relates...07-31-2025, 08:37 PM