sysem hangs, crashes, does not POST afterward
Posted: Wed Nov 16, 2005 2:10 am
I have assembled a Custom box that was working OK for couple of years.
Here are the hardware particulars:
MB Model: M6VLQ, ver 2.1
Bios: vlq1231b.bin
CPU: celeron mod 686 760 MHz (brand ID 01 H)
RAM: DIMM, SDRAM 70 ns, 2 x 128 MB
VGA: on board
Sound: on board
LAN: on board
Modem: none
Power: ILSSAN, model ISP 120S, 120 W, ATX
HDD: IDE, 2 removed
CD: IDE, 2 removed
other devices: removed everything but floppy
Other devices: placed POSTCARD in ISA slot for monitoring purposes.
OS: win98SE removed
OS: Checkit portable edition, version7.1.2
Hung during shutdown at windows trademark screen, required 4 second reset.
Would not finish boot after that; would hang just before user log on with
the screen going blank (black monitor diagnostics saying either no signal or
signal out of range). It would boot up in safe mode but could not get CDs
to be recognized and after a while even safe mode caused screen to go black.
Pulled all drives out to check minimal system using POST CARD and check it
portable. All components that I could check pass, but memory test again
causes screen to go blank. System is stable over 24 hours if that test is
not run. Repeated test using each DIMM separately and system still hung
with screen going blank. CMOS was grounded BIOS was reflashed with no change
except that the monitor retains a signal of VGA400 at 70 Hz instead of no
signal or out of range. But it is still going blank. If I try to reboot
right after the crash within about 5 minutes, the keyboard flashes lights
momentarily and then goes out and no POST codes show up on the card, that is
the system does not seem to start POST. If I wait overnight it boots
perfectly and checkit will run fine as long as I don't test the memory;
video passes tests repeatedly.
The voltages coming from the power supply when running and after hanging
appear to be the same and are 12v- 11.8, 3.3v-3.3, 5v- 5.13,
5vsb-3.3, -12V-12.1, PS_ON-5, PW_OK- a couple hundred mv. All fans are
working and the CPU does not feel hot. Does anyone have any clues on where my problem is?
Here are the hardware particulars:
MB Model: M6VLQ, ver 2.1
Bios: vlq1231b.bin
CPU: celeron mod 686 760 MHz (brand ID 01 H)
RAM: DIMM, SDRAM 70 ns, 2 x 128 MB
VGA: on board
Sound: on board
LAN: on board
Modem: none
Power: ILSSAN, model ISP 120S, 120 W, ATX
HDD: IDE, 2 removed
CD: IDE, 2 removed
other devices: removed everything but floppy
Other devices: placed POSTCARD in ISA slot for monitoring purposes.
OS: win98SE removed
OS: Checkit portable edition, version7.1.2
Hung during shutdown at windows trademark screen, required 4 second reset.
Would not finish boot after that; would hang just before user log on with
the screen going blank (black monitor diagnostics saying either no signal or
signal out of range). It would boot up in safe mode but could not get CDs
to be recognized and after a while even safe mode caused screen to go black.
Pulled all drives out to check minimal system using POST CARD and check it
portable. All components that I could check pass, but memory test again
causes screen to go blank. System is stable over 24 hours if that test is
not run. Repeated test using each DIMM separately and system still hung
with screen going blank. CMOS was grounded BIOS was reflashed with no change
except that the monitor retains a signal of VGA400 at 70 Hz instead of no
signal or out of range. But it is still going blank. If I try to reboot
right after the crash within about 5 minutes, the keyboard flashes lights
momentarily and then goes out and no POST codes show up on the card, that is
the system does not seem to start POST. If I wait overnight it boots
perfectly and checkit will run fine as long as I don't test the memory;
video passes tests repeatedly.
The voltages coming from the power supply when running and after hanging
appear to be the same and are 12v- 11.8, 3.3v-3.3, 5v- 5.13,
5vsb-3.3, -12V-12.1, PS_ON-5, PW_OK- a couple hundred mv. All fans are
working and the CPU does not feel hot. Does anyone have any clues on where my problem is?