Re: VHF/UHF preamp ckt doesn't work
Thanks RF. You're right and I didn't know how high the TV channels were into the UHF range before.
Thanks RF. You're right and I didn't know how high the TV channels were into the UHF range before.
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Hi guys
I have this power transistor, it's taken from a Class G Power Amplifier. I already found two short circuit diodes on the Faulty Channel, but I decided to remove the other transistors and test them.
They all test OK but this one is marked B1186A and on my Peak DCA55 it analyzes as a PNP Digital Transistor (which I believe is a transistor with integral base resistor) but if it is a 2SB1186A then it should detect as a regular PNP Transistor.
Having said that I put it in my LCR-4T semiconductor analyzer and that just says it is a PNP Transistor.
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Hello, I have an "ASUS ROG Strix G713QR" laptop, and for approx. 3 months I have the following problems:
1. Laptop keyboard doesn't work
2. The backlight on the laptop keyboard doesn't work
3. The x2 side LEDs (red) on the laptop don't work
The power button works, the touchpad works, and all the USB, HDMI, Ethernet, etc. ports work.
I already tried to reinstall all the drivers and reinstall Windows. So I don't know what to try anymore that is software-related.
But I am strongly aiming that it is somehow a BIOS-related problem,... -
Hello, I got this AVR for cheap and tried to fix it as a fun and learning project.
First the audio video receiver would turn on but had no sound at all, but no "PROTECT" message.
So, I opened the metal case and noticed some marks showing that some liquid has been spilled on the amp. Those water marks were found on the main board and the digital board.
I disassembled everything, then checked every single cap on every board of the amp and recapped when needed.
Also fixed A LOT of cold solder joints and also done some modifications,... -
hello everyone, I have a particular problem with this lenovo ideapad 330s-15ikb. I had to replace the motherboard due to liquid damage, after replacing it I noticed that some letters on the keyboard do not work. So I bought a new keyboard and now all the keys work except the numeric keypad area. In practice the num lock key LED always remains on and the numbers do not work. Has anything like this ever happened to you? I also tried changing the keyboard again but the same defect remains on the numeric keypad.
I tried updating the bios but the problem remains
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