Compaq Contura 400 Maintenance And Service Manual page 276

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Table 5-13. Solving System Start Problems
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Problem
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System powers up (LEDs
on) but it does not
begin POST.
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Table 5-14. Solving Standby Problems
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Problem
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The power/standby button
is pressed, but the unit
does not go into
standby.
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Table 5-15. Solving Battery Problems
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Problem
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Battery indicator
flashes to indicate low
battery condition, but
computer does not beep.
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Battery indicator
doesn't light and
battery pack won't fast
charge.
Probable Cause
Bad contacts
between processor
board and system
board.
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Defective
processor board.
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Defective system
board.
Probable Cause
Defective keyboard
assembly.
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Defective system
board.
Probable Cause
Low battery beeps
were turned off.
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Volume is turned
on/off.
Battery pack is
already charged.
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Battery pack was
and attempt to
power the unit up.
If the unit powers
up, replace the
inverter board.
b. Disconnect the
display cable from
the display panel
and power the unit
up. If the unit
powers up, replace
the display panel.
c. Replace the display
cable.
3. Replace the system
board.
Solution(s)
Replace system board.
Replace system board.
Replace system board.
Solution(s)
Replace the keyboard
assembly.
Replace the system board.
Solution(s)
Use Power Management to
turn on the low battery
warning beeps.
Press the Fn + F5 keys.
No action is necessary.
Allow time for the battery