I don't think Quake is the reason for this happening, as I've used PSPQuake for hours with no problems.
Though its not beyond the realm of possibility. My PSP Slim did the same thing with its power light, but it wouldn't boot up at all. Had to return it. I never used Quake when this happened. Make sure your in 1.50 kernal mode, unless it was a release for Slim specifically.
And yeah, DCEmu is dying, mainly due to the server issues.

Most people can't stay logged in say they say screw this and leave. Other then that, its getting dreary again.
Bookmarks