Most hard drives are 5 year designs so replace any component in that machine that is over 5 years old if this machine must be kept alive.
i recently reinstalled ME. since then i have intermitant problem with hard drive. when i shut down comp and restart ME sometimes does not boot. when i use startup diskette and look under IDE Config it says hard drive not installed. ive disconnected the IDE cable and power and sometimes after restart it works fine. But most of the time i give up for the night and try again next day. so far next day startup is like nothing was wrong. need help