Transistor QF601 for Mainboard CB53 Main: L1800 1390 1430 Epson Printers - Fix No Power

Troubleshoot the "No Power" Issue in CB53 Mainboard Printers, such as L1800, 1390. This issue may not stem solely from the power supply. A potential cause could be a damaged mainboard.

Begin by examining the four transistors on the power bridge (with silver head sink). If these four transistors appear functional, focus on this QF601 transistor adjacent to the USB cable socket. Testing this specific transistor is crucial, as it is key in resolving power outages, although it might not address all problems.

Package includes ONE (1) Transistor.