First of all; hello all and many thanks for maintain live the msx spirit
After about 12 years without use; I recovered my old MSX2 from the vault.
But it seen to have a problem somewhere at the power supply or the video signal regulator. All i get on screen is a darkgreen picture, with a moving shadow that appears to be the MSX moving logo at the start. The floppy disk drive had loose the transmission gums but everything else looks to work ok, sounds, music from cartridge games...ect.
I have opened the case, and all looks ok. I dont have a multimeter to verify voltages. So i wonder if you have seen this problem before or if you have any idea what could be wrong.
Thanks in advance!
This is the image displayed:

The machine:
PD: the image is perfectly sintonized, thats not the problem.
PD2: Please, could you post the voltages of the cable coming from psu to motherboard to measure them?


the power supply is like the 'low hanging fruit' in computer repair - easy to diagnose, easy to fix. Tip: unplug the floppy drive power cable - it also uses +12V (if original drive). It's very unlikely the floppy drive does something to nuke the +12V line, but you don't need the floppy drive for diagnosing this problem anyway (=make the system simpler, narrow your search area).