WESTERN ELECTRIC 300B Single Stereo Power Amplifier LUXMAN KMQ-80 Chassis Used, No Sound, Defective, No Returns I connected a CD player to the preamplifier and tried to play sound, but I only heard a "humming" sound, and no music. This amplifier was purchased at a high price from an elderly audio enthusiast who is in poor health. When I opened the back cover, I found many areas where soldering had not been done. I am a complete novice, so I don't understand what's going on at all. The original owner didn't seem to know much either. I have no idea if the amplifier is faulty, if the circuit is correct, if the soldering is bad, or if the vacuum tubes are bad. Please decide whether to repair it, rebuild it, or use it for parts. Vacuum tubes: westeren electric 300B x 2 westeren electric 404A x 2 National Matsushita 5AR4 x 1 GE 12BH7A x 2 Made in China 12AX7B x 2 Transformers: Power transformer LUX 5A48 x 1 Choke transformer LUX 4710 x 1 Output transformer Unknown details x 2 Chassis: LUXMAN KMQ-80 (Modified) It seems that some parts have been reused, I don't understand well. Because I am a complete novice, the description may be incorrect. Please make your judgment based on the photos. Due to the defective and modified nature of the item, cancellations, returns, and refunds are not possible. Please be careful when bidding.