I had some perfomance issues today with my iMac 8,1 (OS X 10.5.8) an tried to reboot it. Bad idea.... Nothing happened except for the flashing folder symbol. 
Hardware Test told me: Error 4MOT/1/40000003:HDD-1327 and accordingly 4MOT/1/40000003:HDD-1339 (in two separate passes).
What to do now?
Hardware Test told me: Error 4MOT/1/40000003:HDD-1327 and accordingly 4MOT/1/40000003:HDD-1339 (in two separate passes).
What to do now?