I/O assembly................................................................................................................................................................................................................................... 21
Battery............................................................................................................................................................................................................................................... 22
Optical drive................................................................................................................................................................................................................................... 23
Storage device..............................................................................................................................................................................................................................24
Memory fan duct........................................................................................................................................................................................................................26
Front card guide and fan....................................................................................................................................................................................................... 26
Memory fan.....................................................................................................................................................................................................................................27
Rear fan............................................................................................................................................................................................................................................. 28
System board................................................................................................................................................................................................................................ 29
Power supply.................................................................................................................................................................................................................................30
Heat sink............................................................................................................................................................................................................................................ 31
Processor ........................................................................................................................................................................................................................................ 32
5 Troubleshooting without diagnostics................................................................................................................................................................................ 35
Before you call for technical support.......................................................................................................................................................................... 35
Helpful hints...................................................................................................................................................................................................................................36
Solving general problems....................................................................................................................................................................................................36
Cannot access the Computer Setup (F10) Utility when booting the computer.................................................................36
Computer appears locked up and will not turn off when the power button is pressed...............................................37
Computer will not respond to keyboard or mouse ..................................................................................................................................37
Computer date and time display is incorrect .............................................................................................................................................37
There is no sound or sound volume is too low............................................................................................................................................37
Cannot remove computer cover or access panel .................................................................................................................................38
Poor performance..........................................................................................................................................................................................................38
Computer turned off automatically and the power light blinks red four times and then white two
times.........................................................................................................................................................................................................................................39
System does not turn on and the lights on the front of the computer are not blinking...............................................39
Solving power problems .......................................................................................................................................................................................................40
Power supply shuts down intermittently........................................................................................................................................................40
Computer turned off automatically, power light blinks red two times followed by a two-second
pause, and the computer beeps two times (beeps stop after fifth iteration but lights continue
blinking) ..................................................................................................................................................................................................................................40
Power light blinks red four times followed by a two-second pause and the computer beeps four
times (beeps stop after fifth iteration but lights continue blinking)............................................................................................ 41
Solving hard drive problems............................................................................................................................................................................................... 41
Hard drive error occurs............................................................................................................................................................................................... 41
Disk drive transaction problem ............................................................................................................................................................................ 42
Drive not found (identified) ...................................................................................................................................................................................... 42
Nonsystem disk/NTLDR missing message ................................................................................................................................................. 42
Computer will not boot from hard drive..........................................................................................................................................................43
Computer seems to be locked up ......................................................................................................................................................................43
Solving audio problems.........................................................................................................................................................................................................43
Sound cuts in and out..................................................................................................................................................................................................43
Sound does not come out of the speaker or headphones ..............................................................................................................43
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