The problem with this TV is that it is clicking ON and OFF. Have checked all the voltages and the only one not correct is the Vscan, which starts at -70volt at switch on, the goes to approximately -110volts, any ideas.
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We all of the sudden started getting a washed out picture and rainbow colored static/snow.
When we tested vscan, etc., everything measured properly but not the vscan.
Supposed to be -193 got -93 (tested it w the TV on)
Researched it and decided to replace the y board and y buffers.
Now I get no picture or sound - TV turns on but nothing else.
When I run the same tests I am still getting -93 on the vscan test and this is now a different Y board, buffers, etc.
So I am thinking either I did something wrong originally in... -
Hello everyone,
This is my first post on the forum
I recently purchased a MacBook A2141 from a colleague at work, which had issues with the dedicated GPU. The system occasionally displayed artifacts on the screen and sometimes experienced kernel panics related to the GPU. Interestingly, applying pressure to the VRAM module would temporarily resolve the artifact issues, which made me optimistic about the ease of repair.
Board: 020-01700, Config: Intel i7, 512GB SSD, 16GB Ram.
Before completing the purchase, we decided to erase... -
Hello everyone,
I'm working on repairing a Music Store Professional GO! SUB 18A bass subwoofer, and I need some help troubleshooting an issue with the power amplifier board. The board uses an IR2153 driver and originally had two SLW20N50C MOSFETs. Unfortunately, these MOSFETs burned out. I replaced them with two TK20J60W MOSFETs; however, these also failed almost immediately.
Here are some details:- SLW20N50C (original):
- Rated for 500 V
- Typical RDS(ON): 0.21 Ω
- Continuous Drain Current: 20 A at 25°C (13 A at 100°C)
- Pulsed Drain Current: 80 A
- Avalanche
- SLW20N50C (original):
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Hello,
I'm trying to fix a TV that got damaged by rain (open window during a storm).
The TV at first would start up and work completely normal, with no lines on the screen or anything. But after about 30 seconds, it turned itself off. After it shut itself down, starting it up directly afterward is no longer possible.
The standby light is red and it blinks once on the power-on command by the remote. The relay also does not click anymore when plugged into the wall.
Standby voltages are all present and stable, approximately 13V for the 20V line... -
Good day everyone,
I have a AIWA 32" TV model #
AW32B4SM that is turning ON with a blank screen. The backlight is working but there is no image on the screen. I did the standard troubleshooting checks: logic board inspection under microscope, reseating ribbons cables, power rail checks, diodes, mosfet checks, power on and measure voltages on coils, caps, vcc, regulator checks all check good. Then I measured the panel voltage (12v present) and noticed that the VONE (approximately 30v) was missing, the AVDD (15v) was only 5v, vcc 3.3v present, vcc 1.8v present. I know when...10-03-2025, 06:06 PM