This is a long shot, but the 330 has sort of an odd "rebooting" sequence you have to follow precisely or it won't clear its corrupted memory correctly. Did you follow the instructions in the manual exactly? You first have to press and hold the standby/power button for ten seconds, at which point the welcome should appear, then let go of the button. Turn it off again and wait for the clock to reappear (instead of welcome). Then unplug the power cord and leave it unplugged for 24-48 hours before plugging back in. If that doesn't solve your problem, the unit is most likely hosed.
I know this is annoying, because money is tight for everyone these days, but you also have to factor in that the 330 is a Spring 2006 model. Post-2005 "affordable" DVD-only machines tend to just go "phffft" within 24 months of purchase, its unrealistic to expect more durability from them. It may have been on its way out and the power surge pushed it over the edge. These units are disposable after the warranty expires, a repair would cost nearly as much as a new recorder. Nowadays the only units left with even minimal solidity are the Panasonics, buy one soon before next years models hit the shelves in a month or two. Look for the EZ-18, 28 or 38, try online for Panasonic-refurbished units at attractive prices. The new Panny model numbers will end in "9" and might very well be of the same shoddy OEM construction that plagues recent Sony, Toshiba and JVC machines. (If you live in Canada, consider the Sony 780: its really a Pioneer and sturdier than the current USA-market Sonys).