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can’t see playback. seeing ghost images instead

can’t see anything in the composer video, just ghosts of whatever goes through it. audio works fine. my specs are:
Windows 10 NVIDIA GeForce GTX 650 plenty of ram
tried updating the drivers, didn’t change.
tried reinstalling, didn’t change.
***avid used to work fine, then I stashed my pc for couple of months and after turning it back on it stopped working. can my graphic card be damaged? I also have an Intel HD 4600 in this pc, tried switching to it and still nothing changed… any ideas?
Thanks