HP Pavilion xt500 HP Pavilion & Compaq Presario Notebook PC - Service Manu - Page 79

Table 3-3. Troubleshooting Suggestions, Troubleshooting and Diagnostics, Service Manual

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If you cannot isolate the cause of a problem using the above diagnostic tools, use the suggestions in the following table to help find the problem. Table 3-3. Troubleshooting Suggestions Symptom Call Center: Suggestions Repair Center: Likely Causes Repair Center: Comments To help determine likely causes of a problem, determine which replaceable modules are involved in the system function and what roles they play: see the figure on page 1-27 and the table on page 1-28. Startup Does not boot on AC or battery. Check power source. Press and hold power button to turn notebook off, then press power button to turn notebook on. Unplug AC adapter, remove the battery and any PC cards, press reset button to turn notebook off, then reconnect power and try again. Do not use touch pad while booting or resuming. Remove all but one SDRAM module and try again. Reinsert any other SDRAM module and try again. AC adapter. SDRAM module. CPU module. Switchboard PCA. Motherboard. Display assembly. Hard drive. Beeps once, spins hard disk, repeats, but does not boot. Does not boot on battery, but boots on AC. Does not boot from floppy drive. Does not boot from CD in CD/DVD drive. Make sure at least one SDRAM module. SDRAM module is installed. Make sure battery is properly installed and fully charged. Check battery level on battery LEDs. Check battery contacts. If available, try another battery. Make sure floppy disk is bootable. Use BIOS Setup to check default boot order. Make sure CD is bootable. Use BIOS Setup to check default boot order. Restart notebook. Battery or contacts. Motherboard. Floppy disk or floppy drive. Motherboard. CD/DVD drive. Motherboard. Check AC adapter. Remove all but one SDRAM module and try again. If power status light does not turn on, reprogram BIOS, replace top case, replace motherboard. If power status light turns on but display remains off, try external monitor. If monitor shows successful boot, replace display assembly. If monitor shows activity but BIOS does not complete, replace display assembly. If monitor is blank, replace switchboard PCA, replace motherboard. If power status light and display turn on, BIOS completes, but OS does not start from hard disk or floppy drive, replace CPU module, replace motherboard. If OS starts from floppy drive, reload hard drive, replace hard drive. Make sure floppy drive is installed and connected correctly. Make sure CD/DVD is installed and connected correctly. 3-6 Troubleshooting and Diagnostics Service Manual

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If you cannot isolate the cause of a problem using the above diagnostic tools, use the suggestions in the
following table to help find the problem.
Table 3-3. Troubleshooting Suggestions
Symptom
Call Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
To help determine likely causes of a problem, determine which replaceable modules are involved in the system
function and what roles they play: see the figure on page 1-27 and the table on page 1-28.
Startup
Does not boot on
AC or battery.
Check power source.
Press and hold power button
to turn notebook off, then
press power button to turn
notebook on.
Unplug AC adapter, remove
the battery and any PC cards,
press reset button to turn
notebook off, then reconnect
power and try again.
Do not use touch pad while
booting or resuming.
Remove all but one SDRAM
module and try again.
Reinsert any other SDRAM
module and try again.
AC adapter.
SDRAM module.
CPU module.
Switchboard PCA.
Motherboard.
Display assembly.
Hard drive.
Check AC adapter. Remove
all but one SDRAM module
and try again.
If power status light does not
turn on, reprogram BIOS,
replace top case, replace
motherboard.
If power status light turns on
but display remains off, try
external monitor. If monitor
shows successful boot,
replace display assembly. If
monitor shows activity but
BIOS does not complete,
replace display assembly. If
monitor is blank, replace
switchboard PCA, replace
motherboard.
If power status light and
display turn on, BIOS
completes, but OS does not
start from hard disk or floppy
drive, replace CPU module,
replace motherboard. If OS
starts from floppy drive,
reload hard drive, replace
hard drive.
Beeps once, spins
hard disk, repeats,
but does not boot.
Make sure at least one
SDRAM module is installed.
SDRAM module.
Does not boot on
battery, but boots
on AC.
Make sure battery is properly
installed and fully charged.
Check battery level on battery
LEDs.
Check battery contacts. If
available, try another battery.
Battery or contacts.
Motherboard.
Does not boot from
floppy drive.
Make sure floppy disk is
bootable.
Use BIOS Setup to check
default boot order.
Floppy disk or floppy
drive.
Motherboard.
Make sure floppy drive is
installed and connected
correctly.
Does not boot from
CD in CD/DVD
drive.
Make sure CD is bootable.
Use BIOS Setup to check
default boot order.
Restart notebook.
CD/DVD drive.
Motherboard.
Make sure CD/DVD is
installed and connected
correctly.
3-6
Troubleshooting and Diagnostics
Service Manual