Sony PS1 (SCPH-7501, 1998 September) laser problem

I’m getting almost no or very bad laser reading in my PS1 (older) unit since early 2006. Is this because of a ageing laser or something else? This happens with brand-new original games as well as any copies. I have to flip the unit 90 degrees clockwise and let it sit on its right side in order to run any games now.

What do you think is the cause of this and what can I do about it? I hardly ever ran the unit between late 2003 and 2006.

I currently am trying to get games to run smoothly in ePSXe and I want a DexDrive to get my memory cards to my PC for archival and use in the emulator. Anyone know where I can get a DexDrive in the US?

Thanks very much…