Presario SR1810NX
what monitor.? name and model... vast exist... no all work.
test the monitor first on known good PC that is 1st 1st.
does the Monitor (its button) OSD screens work,, if not monitor is toasted (good power in) if monitor is 2001 relic, some have hidden inside, power saver clock (turn it off , using OSD screens)
no it's not your bios, like the www, myth loves to repeat, ad nausum
here is the correct mess order.
But BIOS screens are the 1st GOAL always,,,,
your not there yet.
1:
test the monitor first, on other PCs when sure its good move it to
the Presario SR1810NX (and a good known monitor)
2: turn the Presario SR1810NX , on, then see if all fans run
that means SKINS off, omg, the fans are packed in lint , omg2, the CPU fins on its heat sink are packed, bad. (a yearly event)
A CPU can overheat fast, if not able to stay cool.....
CPUs go slower or even halt if the they see massive heat rise.
(built in self preservation mode)
all fans must run and flow air, as the designer wanted. for sure.
then make sure the fan in the PSU runs, if yes, good. if not you lost 12vdc to the fan, bad PSU.
PC sounds to be working, yes?? what do you hear now? a key fact?
3:
push the CD/DVD eject button if it can not eject the PSU is dead.
there are more steps. lots more.
Even the HP service manual tells you how to test the PSU, read that?
http://pcdied.com/black-screen.html#DT-only