eMac CRT loses image

[BmcMaxz]

I have an eMac G4 (CRT), it loses image (black screen witout light) but of I gently tap the monitor, the image comes back.
What could be the cause?

 

[redheeler]

Usually a problem like this with any CRT means bad solder joints on the analog board. eMacs are also known to have capacitor issues. Hard to say for certain without more in-depth testing though.

These issues are fixable but require some technical skills to do so. Opening up CRTs with high voltage components inside can be dangerous.

 

[BmcMaxz]

Usually a problem like this with any CRT means bad solder joints on the analog board. eMacs are also known to have capacitor issues. Hard to say for certain without more in-depth testing though.

These issues are fixable but require some technical skills to do so. Opening up CRTs with high voltage components inside can be dangerous.

I found the guilty, the flyback transformer is unsoldered of the image board.
I soldered the flyback after a tedious disassembly an it's working again, it's my first repair (xd)