09-08-2017 07:13 AM
Good day sir/ma.
I got an Elitebook 2540p(corei5, 4gb RAM)fairly used which has lasted for me fairly 2 years now.
I slept off while using it yesternight, luckily for me it went to sleep to save power.
Buh unluckily for me, I couldn't wake. So I had to remove the battery and try a hard reset thinking it was going to come on. But to my suprise, it didn't. The only LEDs on were the hard drive, wirless and charging LEDs. Each time I try to to power it on, the power LED doesn't come on.
Please help out.
I'm stranded here because I have a work to deliver 4days from now.
I'll be grateful for a quick response.
Thanks in advance
Solved! Go to Solution.
09-08-2017 07:48 AM - edited 09-09-2017 05:57 AM
my guess is the power ac was lost and the batter died, not sleep , it died , battery discharged.
the power button does nothing
my w10 comments are only to tell you HP does not support w10 on this platform, period, and the ramifications of all that.
my elitebook screams too on w10, but many things are dead, a list 10 things I have, but my guess is you have no need for those 10 things (like the HP security package is dead and more)
my guess now , I cant watch it fail.,
is power pack bad.
or power jack cracked, at mobo.
and BIOS is dead due to no power , now.
if you charged that battery in PC #2 youd find the PC#1 (bad pc) runs with that fresh charged battery
but you cant do that no second 2540p ,
forget my w10 comments its not cause, for sure, just a heads up on facts related to w10.
09-09-2017 05:29 AM - edited 09-09-2017 05:37 AM
it ran w10 you meant, so did the last 7, I did, but my comment was to only warn you of lost support. ok.? sure it's a harware issue.. and many HP features will be dead with W10, so lets forget w10 ok.>
I cant see or watch you so. .what does it do.?
- it powers on?
- fan runs and stays running.?
- fan and vents free of lint ? not packed full, causing fast overheating.?
- screen never ever snow text ever, or HP logo, or the" Hit ESC to enter setup" like id did for years. this is BIOS>?
- do the power on ESC, F9, F11 keys work/? called the BIOS (hpsetup) hot key work.?
- does the flash light trick reveal data. see link below.?
- does ear to hdd hatch on bottom , can you hear the HDD motor spin, (its very low sound but it does spin)?
- does it beep for flash, LEDs in code sequence? like the caps lock key?
- tell all that you see and hear power on. please.
the flash light trick (this finds a dead black lamp easy)
the 40p is LED screen I think, not CCFL that love to die.
the 30p is CCLF i think (yes tricky, to find)
the goal is first to get BIOS working can you, step above and if that works what (see the diagnostic is bound by logic)
BIOS ok and its CMOS coin cell battery ok , the PC can boot any thing.
we next boot a Linux disk (free) to prove the PC is ok and that he HDD is ok.
if BIOS works run the HDD test in the BIOS pages....
first. if BIOS is ALIVE that is.
here is my elitebooks , doing HDD test this is BIOS screens,
09-09-2017 05:48 AM - edited 09-09-2017 05:51 AM
what happens with the power key
nothing at all,"/? silent.
if silent, the power pack is dead.
or its power does not reach the Mobo.
your mobo has this horror I see.
see that power jack, unlike my nicer 8540w, it has no flex cable, protecting this.
so if the power pack is ok, (is it? 19vdc is ok with voltmeter) we push this plug below in 4 directions, 1 at a time.
and push power button each time, if power turns on this jack below the solder pins are cracked.
seen vast LT do that,,, all really, but never mine. mine has the HP protector , jumper there. (a flex buffer i call it)
if you can hear the fans spins as you flex this point of entry the jack is bad. (so common)
tell more, so far i know almost nothing yet.
my guess is the power button is 100% dead... nothing good happens at all, no fan , is one if the best clues.
and the power lamp dead.
09-09-2017 07:42 AM
well there are 2 paths here 3 counting get it repared in a shop.
i guess my 4 direction power jack at PC case fails>? too??????
that is a test.
why not do simple tests.
and have a spare power pack, i travel all over the world now, and carry 1 extra pack and 1 extra battery.
my trips last for 1 full month too.... retires guys can do anything... love it.
1: path one do tests. try new AC pack., keep battery out, ,
2: buy a voltmeter test the 19vdc power at the PC mother board edge, if that is good the problem is deeper.
if that edge power jack is ok, some fail, its common, I avoid PCs set up that way, sure do.
for that very reason.
the power pack can fail, its like $15 to buy one , like 10% of 1 hour shop labor, to learn that, math works here.....see?
a 65watt or more pack works
sometimes (many times)
the pack is bad, or the input wire to it are broken inside the plastic inslation,
on both ends, of the pack
but what matters only is the 19vdc deal on the mobo , it MUST ARRIVE THERE.
or NO power no joy happens.
no PC runs lacking full power, none. (even solar power is possible but is power non the less)
the fan stalling tells me BIOS is shutting down early, its programmed to run the fan fast until the OS can take over,
The BIOS assumes you are running freeDOS, (HP sells them like this) and FREEDos does not control fans out of the box.
so BIOS runs the fan and watches for overheating, so runs it fast.
some go fast the roll to 1/2 speed, onces it sees it has some control of temperatures, of CPU and GPU chips
so the power is bad. (there are other causes, eg., shorts on things connected to the MOBO) im not teaching A+ certs here.
is it too much to get a new power pack or flex the cables ends like I asked.
that be simple no?
or use a voltmeter.
a volt meter lets humans see Voltage, with that simple device we sees 19vdc.
if 10vdc the pack is bad or mobo has a short. (we strip them all down to find this, ask of motivated)
if the jack is like 0v the 19 then 0v, the jack is BAD>
09-09-2017 07:56 AM
the desktop and laptop do have thing in common
the Laptop has many voltage regulators that send proper voltages to all chips.
and charger chip, to battery.
the laptop turns on, mine has tiny smart processor just for power controls, that can flash LED codes.
this smart device
actually watches the power button its a digital only button (0 and a 1) logic
this tells the Power chip to turn on.
the chip turns on all power, and the CHECK that power is at spec, (means voltages are in spec)
if any rail or any regulator in the MOBO is in over load status or over voltage it detects that and shut the PC off.
this magic prevents the expensive chips from blowing up.
like CPU and GPU, as 2,
the BIOS works only when full power happens and sustains, and the runs POST.
the BIOS loads and sends messages to the screen.
so if power is weak into any PC the power processor sees that and stalls.
a tech knows that and finds out of the ac pack is good first. we tests it.
if that passes we see if the makes it fully onto the mobo...
or we use a good charged battery to see if LT runs that way.
we use a voltmeter and we unload all things on the mobo. all things on the mobo can short. we remove those.
like seen here.
if looking for just wild guesses?, IDK try a new power pack is my one answer here.
see this mobo
i removed 6 major modules and the F1 info page pops in HP BIOS
even remove ram all 4 and try them 1 by one. the key here is keep it cool do not run fan remove or heatsinks defeated.