Solving Minor Problems - Compaq 133756-004 - Deskpro EN - 6550 Model 6400 Service & Reference Manual

Solving Minor Problems

Problem
Computer will not turn on.
Computer appears locked
up and won't turn off when
the power button is pressed.
Computer date and time
display is incorrect.
Computer powered off
automatically.
Computer appears to pause
periodically.
Cannot remove computer
cover or side panel.
Computer does not boot up
and power and hard drive
LEDs are blinking.
Computer does not boot up
and Num Lock LED is blinking;
you may hear one short and two
long beeps.
The Caps Lock LED is flashing;
you may hear one long and two
short beeps.
Computer does not boot up and
the Scroll Lock LED is flashing;
you may hear two long and one
short beeps.
If the standard keyboard has been replaced with a Universal Serial Bus (USB) keyboard,
you will hear the beep sequences mentioned above but will not see the flashing lights.
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F 2 Troubleshooting Without Diagnostics
Possible Solution
1. Ensure that the computer is properly connected to an external
power source and the wall outlet is active.
2. A PCI or ISA card that has been installed is defective. Remove
any expansion card that was just installed.
3. Reseat drive power, data, and power supply cables.
Software control of the power button may not be functional. Press and
hold the button for four seconds, then release. This invokes the
hardware override for the power button.
First, reset the date and time under Control Panel. If the problem
persists, the real-time clock (RTC) battery may need to be replaced.
Refer to the "Removal and Replacement Procedures" chapter in the
product-specific MSG.
1. The unit temperature was exceeded because the unit is in an
exceedingly hot environment or the fan is blocked. Let the unit cool
down.
2. The fan may not be functioning correctly or the air vents are blocked.
3. The unit temperature was exceeded because the computer was
functioning with the cover or side panel removed. Replace cover or
side panel, and let the computer cool down before turning power
back on.
Network driver is loaded and no network connection is established.
Establish a network connection, or use Computer Setup or Windows
Device Manager to disable the network controller.
1. Smart Lock, featured on some computers, is locked. Unlock the
Smart Cover Lock using Computer Setup.
2. The Smart Cover FailSafe Key, a device for manually disabling the
Smart Cover Lock, is available from Compaq. You'll need the
FailSafe Key in cases of forgotten password, power loss, or
computer malfunction.
Ensure that the riser board is properly seated.
Memory may be improperly installed or may be bad.
The video controller is not present or is incorrectly initialized. Clear
configuration memory (CMOS). If a video board has been added,
remove and reseat it.
System board hardware failure (prior to video). Replace system
board.