Though it had been working fine until two days ago, my HP z800 won't boot past the "Starting Windows" animation; it simply turns off during its usual lengthy but verbose boot.
a HP z800 Desk top., full sized too.
what options? what does it have inside, now. ok 1 VGA card now. but is there a CD/DVD or BR disk drive there? options?
running SSD ! good.
its sold with a wide range for RAID drives, options.
and dual Quad-Core Intel Xeon Processor 5500 Series.
7 huge drive bays,
ever think to boot to a Linux CD? LIVE (no HDD need be there)
or windows 7,8,10 LIVE PE windows disk. (no HDD need be there)
my guess is if that fails (above simple test), then the PSU is bad.
it turns off for only these reasons.
1: the OS told it to.
2: the PSU saw errors and turned it self off.
the cause list is huge. (even bad MOBO, bad ram, or anything plugged into that MOBO that is shorted.
The PSU if it sees faults on any of its many power bus lines
it shuts off as after 1full second of trying to get it right (ATX spec)
why not just strip it down to only
mobo,PSU, no vga? , 1 mem stick.
see if fans run, powered on and it holds, there.
have as little plugged in to MOBO is possble
see if you get beep codes or , plug in 1 USB keyboard
and see if the LED there have flash codes.
ever seen a live boot CD? or stick
today all techs, have a boot stick, i have 4,
that why we can test everything out, with no HDD present.
see the POWER OF THAT?
I take a LIVE PE or linux, ISO file and burn a USB stick with RuFUS.
then boot to it, keep it in the tool box. and be empowered.
The PSU when working, some dont shuts off for 2 reasons
Power bus overloads, over/under voltage tests, or the soft power off
bit is TRIPPED.
if no HDD present there will no soft power off , possible. dig?
you push the power button and the PSU must stay up
do the fans go off too, ? you never mentioned FANS.
mine has 4 fans,
if the fans good off, now HDD then the PSU is bad or just UNHAPPY.
unhappy means, OVELOADED.
The more fancy the PSU, the more possible ways to overload
they do that to keep from blowing to kingdom come, $500 set of
processors. (a good thing)?
one more hint, the PSU has this one wire.
called PWR-OK if the PWR-oK goes false, the PSU
learn how this works and all else is easy.
Jun 18, 2017 |
HP Computers & Internet