HP Thermal Monitor
.....................................................................................
83
Non HP diagnostics tools
.............................................................................
83
7. Status lights, blinking light codes, troubleshooting lights, and POST error
messages
........................................................................................................................
84
Status lights
..................................................................................................
84
Blinking light codes
......................................................................................
85
POST error messages
...................................................................................
85
Resolve the issue
...............................................................................................................................
86
8. Hard reset
....................................................................................................................
86
9. Soft reset (Default Settings)
.......................................................................................
87
10. Reseat cables and connections
................................................................................
87
11. Test with minimum
configuration
............................................................................
88
Essential hardware
configuration
................................................................
88
Safe mode
.....................................................................................................
89
12. Test with
verified
working
configuration
(hardware and/or operating system)
.....
89
13. Replace the system board
........................................................................................
89
Verify solution
...................................................................................................................................
90
Helpful Hints
........................................................................................................................................................
90
At startup
...........................................................................................................................................
90
During operation
...............................................................................................................................
91
Consulting with HP Service
...............................................................................................................
92
Common issues and possible solutions
..............................................................................................................
92
Power-on issues
................................................................................................................................
92
No Power
.........................................................................................................................
92
Intermittent power-on, shutdown, reboot
.....................................................................
94
AC adapter issue
..............................................................................................................
95
Battery not recognized, not charging
.............................................................................
95
Battery discharges too fast
............................................................................................
97
Burnt smell
......................................................................................................................
97
POST
..................................................................................................................................................
98
No video (with power)
.....................................................................................................
98
Blinking lights
.................................................................................................................
99
Diagnostics error messages
...........................................................................................
99
BIOS password
..............................................................................................................
101
Performance (OS)
............................................................................................................................
101
Intermittent shutdown
.................................................................................................
102
Blue screen
....................................................................................................................
103
Freeze at Windows Logo (hang/lockup)
.......................................................................
105
Electromagnetic Interference (EMI)
..............................................................................
106
No wake up
....................................................................................................................
107
Unresponsive
................................................................................................................
108
vii