Demanding are you,? this IS NOT HP,
nor is it in warranty after 15 years. wow.....
so there will no DEMANDS BY you, this is free helper here,
(like charity, mom says never bite the hand that feeds you remember? free hands, for sure)
see how far DEMANDS last at HP.
tell me.. love to hear that. on TXT BLOG FIXYA.
a retired PC at HP, its OLD, super RETIRED .
no photos of switch how can we guess that?
i can not see what you see, lacking a photo.
do hot tell any poster not to guess, heck you never showed a photo or even told what OS is there, XP op sys?
the answers will be directly related to your poor inputs. in ALL CASES.
tell me does your doctor diagnose you in some silly text file?
Backup is your job, if not done by you and the HDD crashes
all is gone, unless one W8 -w10 and the cloud saved your bacon.
so far we know little
its PC a DESKTOP
it turns on ,
and screen turns on and never evens shows text message EVER?
NO MONITOR stated, maker or model ,must we guess that too?
if its modern and not some 1985 CRT, but LDC
2004 or newer, ? it will have OSD menu.
turn on the monitor, push select see that OSD menu the monitor brain shows. if not the monitor is dead.
'if the pC dies, monitor it , it tells you, NO SIG or other errors
if the monitor works (gee test on other PC????)
then the PC is bad.
easy no box 1 ok monitor box 2 bad. pC.
if the PCs PSU is not dead.
and fans run the next things is BIOS
so now PC questrions
do the fans in the pC run? all of them????
do the key board lamps glow, as you toggle the caps /or numlock keys?
does the CD drive eject on button push,
no ,no,no, then the PSU is dead.
if the screen shows words of any kind
ever ,say so.
if the screen is black all the time use the OSD button
if dead the Monitor is dead.
no monitor stated.
if the screen shows text,. then tell what it says.
and we can work forward to the relic XP, OS.
16 years old that is and dead, support world wide.