No B+ Voltage on CRT monitor

Thread Starter

Maz2858

Joined Jan 27, 2021
27
Hi, I have a crt monitor that dosent work now, I figured out that a mosfet was running very hot and was shorting the smps(making it stop and restart), I removed it and saw that theres no short circuit now and the led/buttons works but theres no picture, it's the mosfet that generates the B+ Voltage (correct me if i'm wrong)
Monitor : LG Studioworks 700m
lg_studioworks_700me_m_mb700g_ch_ca-108-33.pnglg_studioworks_700me_m_mb700g_ch_ca-108-08.png
 
Last edited:

Thread Starter

Maz2858

Joined Jan 27, 2021
27
Which mosfet are you on about Q719?, and which voltage is down ?
Theres a lot of missing voltages at the flyback transformer, for example -160v , 40v , +400v , +850v are missing and are probably due to the short around the mosfet (one thing im sure is that it isnt the mosfet since it isnt shorted and I even replaced it with another one and the same thing happened)
 
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