HP dv4000, V4000 manual Flowchart 2.5-No Power, Part

Troubleshooting

Flowchart 2.5—No Power, Part 4

Continued from

“Flowchart

2.4—No Power,

Part 3.”

Open

notebook.

Y

Loose or damaged parts?

N

Close

notebook and

retest.

Reseat loose

components and

boards and

replace damaged

items.

N

Power on?

Y

Done

Replace the following items (if applicable). Check notebook operation after each replacement:

1.Internal DC-DC converter*

2.Internal AC adapter

3.Processor board*

4.System board*

*NOTE: Replace these items as a set to prevent shorting out among components.

Maintenance and Service Guide 2–13