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Debra SmithJul 30, 2025
How to troubleshoot no raster and no sound on a Samsung CRT TV?
- BBeth SalazarJul 30, 2025
If your Samsung CRT TV has no raster and no sound, here are some potential causes and solutions: * **No Voltage:** Measure the B[+] voltage at the cathode of D812 (D811). If the +12.5 line is abnormal, check it. * **Voltage Too High:** If the voltage is normal but more than 130V, check the horizontal output signal at TR IC801 Q801 collector. * **Fuse Issue:** If there is an open circuit, check and replace F801. * **Voltage Imbalance:** If the voltage is more than 130V but less than 50V, perform a check and replace components as necessary. * **AVR Circuit:** If the voltage is normal, check and replace the FS AVR circuit or the AVR circuit itself. * **Other Components:** Also, check D801, consider shorting the degaussing coil, and inspect C801.