Backlight turns off after 2 seconds
I have an HP 2509b monitor that is experiencing backlight failure. After turning the monitor on, the backlight turns on and then off shortly thereafter. I have replaced the CFLs (thinking they may be bad) and checked a power supply mosfet and diode one YouTuber recommended replacing. I have also visually checked the capacitors; they all look fine. Yet still, the problem remains. What could be causing this issue, and how may I go about fixing it from here?
Added photos of the power supply. The red wire was a fix of mine when a PCB trace came off with the MOSFET. (I removed it to test the MOSFET earlier in the repair).
Is this a good question?