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Hi all,
This repair is very challenging. I already made my way to the problem. Please read the complete post before commenting. I need the help from good gurus.
The power button on the TV set is working, the same for the power button on the remote control. When activated the power LED changes from red to white and the power supply relay clicks. But no image appears, and no sound is heard.
I already investigated the problem. the Micom chip on the EBR73110104/EBT61520408 main board is the issue. The Micom is IC602 that use the μPD78F0514 (UPD78F0514)... -
Hi,
I'm repairing OPTI-495SLC 386 WB manboard: https://stason.org/TULARC/pc/motherb...LC-386-WB.html
It has some damage due to battery leak that I have cleared. I measured affected wire patches and they seems to be OK. The damaged part is shown on the attached picture.
The board often fails to POST when I turn the PSU on. Most often POST card gives AMI BIOS 12/13 error codes but no code or different codes are also shown sometimes.
When I reset the board while the PSU is running or if I switch it OFF/ON the...03-20-2023, 02:24 PM -
Dear all,
For a friend I'm trying to repair an Acer Swift 3 laptop (SF314-42). I'm not a professional, but have some experience (both as amateur and professional) in working with electronic design and repair of musical instruments.
The issue with the Acer laptop is the following:
It was bought new and used (not heavily) at home for about three years. After normal use, it was put to sleep, connected to charger and left over night (just like any other day). The next morning, the laptop would not wake up from sleep. Instead, when pressing the power button, the power... -
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... -
I have a Vizio M43-C1 stuck in a reboot loop with no backlight.
I've tested all the voltage rails coming out of the power supply and they are "normal" for this model (PS_ON & DIM go high when turned on, BL_ON & 3D_ON are close to zero due to backlight power flowing through the mainboard, 5VSB is 5V, and 12V is 19V, which is apparently normal for this board).
Basically, I get similar results to Garry in this post: https://www.badcaps.net/forum/showthread.php?t=80346
So, I've ruled out the PSU for now.
The reboot loop...
Working...
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