I am trying to diagnose a no backlight problem with this 50 " Sceptre. The red led turns blue when powered on, but no video. I don't know for sure if the audio is working because I don't know what source is selected for the tv. I shined a flashlight into the screen and do not see any video information. I have replaced the main board, but nothing changed. I have 5, 12, and 24 volts coming from the power supply. The backlight connector shows a high voltage at power on, but slowly drops to zero. I thought that since it is led backlit it should be a low voltage for that. My question is, does anyone know what the led backlight voltage should be for proper lighting, and if you have any information that would be useful here. Thanks.
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Hello, everyone!
A co-worker gave me a 55-inch Samsung TV model UN55MU6103F so I can try to fix the following problem... As soon as I plug it in to the wall, the TV turns on, and the display shows a few stripes all over the screen. I took off the back cover and disconnected both ribbon cables that go to the display (one at a time) so by doing that I can narrow down the bad section of the problem, but in both cases the display turns black. I know there are some voltages that I have to check (VGH, VGL, etc.) but don't know what reading each has to show. If anyone could guide me on this,... -
Hi, I'll tell you the story of this PC.
The PC was repaired because it had a shorted power supply. What happened was that the plastic covering the buffer battery positioned by the manufacturer on the capacitor melted, thus generating a short.
After the repair, the PC worked, I installed Windows 11 and I may have had some problems with the video drivers, but after a bit of tinkering I think I solved them.
However, the PC later presented the problem in the video shared very frequently.
The problem also occurs at startup, in the bios and when using it as a monitor thanks...02-27-2024, 10:17 AM -
PC Specs:- CPU: Ryzen 5 1600
- GPU: GTX 1080 Palit JetStream
- MOBO: ASRock ab350 PRO4
- RAM: Crucial Ballistix Sport 2x8GB 3000MHz (XMP 2.0)
- PSU: XFX 650W (don't remember what model)
- OS SSD: ADATA SP920
- OS: Windows 10 21H2
Problem description:
Hi. I have a problem that has been going on for some time (2-3 years). It's hard to explain what it really is. Sometimes, my computer stops playing music, stops videos (starts buffering on youtube), there is no sound in games and when I minimize the game window and return to the game there is a black screen with window borders... -
Hi guys! I have a problem with macbook pro A1502. This display have a apple video, when launch desktop, this display is off. A connect thunderbolt a monitor, have video and laptop and monitor. Disconnect thunder video power off. Whats problem? 🤦🏻*♂️ thankss -
Hi everyone.
I have the following problem.
I have a Grundig GV-250 VCR which has not been used for over 10 years. When I turned it on, the fuse of the PSU burned out, after being replaced it burned again, I ended up verifying that I had the bridge rectifier and the mosfet in short, I ended up replacing it, and I replaced all the electrolytics of the PSU. However, it started to behave strangely, as I will show you in the video that I will attach as a link.
In short, I ended up replacing all the ICs on the power supply CNY17G, TDA4605, TL431, TDA8137, TL082CP, AN3824K, L2720,...