HP OmniBook 800CCT Service Manual page 60

Symptom
Screen white
Bright or missing pixels or
lines
Intermittent or no display
Power/battery
Short battery life
Battery gauge falls rapidly
Battery won't charge
Computer won't turn
on/won't boot
On ac or battery
On battery (OK on ac)
Error message: "Invalid
system disk"
Error message: "Floppy disk
Call Center
Send in for repair.
Explain display spec for missing
pixels. Send in for repair if it
fails display spec criteria.
Press [Fn]+[SysRq]. If
ineffective, send in for repair.
Turn display brightness down.
New BIOS v 1.02.00
Set Computer and Hard Drive
"Idle Time Before Turn-off" to
equal values (Select OmniBook
Power Management in Control
Panel).
Remove any PCMCIA cards and
run PWR800.exe
If above ineffective, send in for
repair.
Normal behavior at higher levels.
Does the customer have another
battery to try?
Does customer have access to
another battery and ac adapter?
If so, have them try different
combinations to isolate to
battery, ac adapter or
OmniBook, and send defective
component in for replacement. If
not, send in all 3 for repair.
Is the charge light on when on
AC? If not, try another AC
adapter if available. If yes, hard
reset. If no response, remove
battery and AC, letting computer
sit for a minute. Reinsert battery
and press reset button. If this
works, update the BIOS. Any
sound? If yes, plug in external
display and press [Fn]+[SysRq].
What does the fuel gauge read?
If empty, press [f4]+[ON]. If still
empty, does customer have a 2
battery to try? If not, send in for
repair.
If floppy drive is connected,
check for non-system (boot)
floppy disk in drive. If so,
remove floppy and reset. Use
recovery CD to rebuild system if
still bad.
Repair Center
external displays.
Replace display
Replace display if it fails
display spec criteria.
Check for display cable
pinched in case parts.
New BIOS v 1.02.00
Run PWR800.exe to measure)
battery life (program obtainable
from the MCD Internal Web at
http//webmcd.cv.hp.com/prods
upp/ob800/software/index.htm
Isolate to defective component
(battery, ac adapter or logic
board).
Check for display cable
pinched in case parts. Is
charge light on when on AC? If
no, replace CPU board first,
then logic board. If yes, try to
boot off a floppy. If this works,
reburn BIOS. If it's still bad,
then replace HD. If still bad,
replace logic board and
reinstall old HD.
Try a known good battery first.
Examine battery contacts for
nd
contamination or physical
damage. Then replace logic
board.
Will computer boot off floppy
drive? If yes, verify keyboard
support plate is of later design
or has I/O insulator (see
Service Note 800-09). Verify
hard drive insulator is above
the keyboard support plate tabs
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