HP Elitebook 2530p won't start, power thunderbolt light flashing

this is correct and first step ,bravo
this resets sleep and hibernate modes
that all PCs seem to hate.
they fail due to bad drivers, is the reason.
I can add more here try running the PC
with no huge battery only on AC line pack first. (you can do that to the end of time)
as old batteries, will short, even in 1 year.
ask Sony how that worked out for them, IN THE NEWS RECALLS for FIRES. there. this is correct and first step ,bravo this resets sleep and hibernate modes that all PCs seem to hate. they fail due to bad drivers, is the reason. I can add more here try running the PC with no huge battery only on AC line pack first. (you can do that to the end of time) as old batteries, will short, even in 1 year. ask Sony how that worked out for them, IN THE NEWS RECALLS for FIRES. there.

Hold the power button Hold the power button

why post 7 years late, no calendar?

in a time warp>?

not only that but the wordless BS video above is useless.
and invites doing the wrong things.... and causing more damage, than exists now.
take A+ class, first. learn the ropes first.
not only that the OP fixed the PC 7 years ago.

others with HP laptops.
do the offical HP long reset yet
as stated on HP.com (real) like million times.
then run with no main huge battery next
then next test the AC power Pack.
next is fans, does the 1fan blow, air.?
it must or it will over heat fast, some in seconds and shuts down.(by DESIGN)
History matters,...
after 5years the CCFL backlamps go dead, on all these old PC's, so that is next.
do you see data on the screen with flashlight,
yes, that means CCFL tubes dead.
CCFL are year 2000 to 2010 years mostly
if you dont know what CCFL is google it. or wiki it....
next up, no text ever on the screen , try Esc key at power on make sure BIOS works FIRST>
not windoz.

If you have text tell the helper that first.
power on hammer ESC key (hit the key it told you every day of its life, .
"hit ESC to enter HP SETUP" see that? ever?
from here we can go deeper
and not one time jerk chips off the motherboard, ever. (wow but bs that is.)

This post is to new poster, not wanting to guess or do damage to the PC, like
mohammed just did.

see black screenfails here. (vast reasons)
http://pcdied.com/black-screen.html
why post 7 years late, no calendar? in a time warp>? not only that but the wordless BS video above is useless. and invites doing the wrong things.... and causing more damage, than exists now. take A+ class, first. learn the ropes first. not only that the OP fixed the PC 7 years ago. others with HP laptops. do the offical HP long reset yet as stated on HP.com (real) like million times. then run with no main huge battery next then next test the AC power Pack. next is fans, does the 1fan blow, air.? it must or it will over heat fast, some in seconds and shuts down.(by DESIGN) History matters,... after 5years the CCFL backlamps go dead, on all these old PC's, so that is next. do you see data on the screen with flashlight, yes, that means CCFL tubes dead. CCFL are year 2000 to 2010 years mostly if you dont know what CCFL is google it. or wiki it.... next up, no text ever on the screen , try Esc key at power on make sure BIOS works FIRST> not windoz. If you have text tell the helper that first. power on hammer ESC key (hit the key it told you every day of its life, . "hit ESC to enter HP SETUP" see that? ever? from here we can go deeper and not one time jerk chips off the motherboard, ever. (wow but bs that is.) This post is to new poster, not wanting to guess or do damage to the PC, like mohammed just did. see black screenfails here. (vast reasons) http://pcdied.com/black-screen.html