Question about HP Media Center m7250n (ED842AA) PC Desktop

1 Answer

My hp desktop pc model hstnc-006p-mt wont start up after installing new psu

The machine turns on, but nothing else happens except fo the monitor to write 'going to sleep' and the LED on the front panel blinks on and off at a steady rate. The machine will not turn off.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that gotĀ 5 achievements.


    An expert who has achieved Level 3.


    An expert that hasĀ over 500 points.

  • Master
  • 449 Answers


so there is a setting in your computer that will not be stand by

so!!! here your gonna do
1.go to start menu
2.setting and then control panel to the power option
4.try to set the monitor, hardisk and system
5.set them in "never"

if there is anything problem try to email me

Posted on Sep 18, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Why wont my compaq pressario sr5522uk wont turn on

See if this link
and from that page, this
You need to say exactly what the circumstances and what happened during power failure and exactly what happening when you power up now. Take the side panel off and look inside when you power up. Do the fans spin ? You should disconnect everything and reconnect only the mouse k/b and monitor. Also turn off your PSU using switch on it (if present) and unplug from the mains, and try again after a bit (say, 8 hours). Which lights come on the front panel ? Power ? Hard disk activity ? Does it try the CD/DVD/floppy ?
There used to be (it might till be there somewhere) a page describing the what the behavior of the lights on the PSU meant.
Short of anything visibly obvious inside the case and no other symptoms (as you describe) I'd try swapping the PSU for a known good one but it really might be almost anything. Your HD might have been caught in the middle of doing something making that faulty. Fault finding is mostly educated guesswork then random chance. Maybe in the worst case your m/b is dead.


May 26, 2014 | Compaq Presario 5000 PC Desktop

2 Answers

MY HP500B MT wont wake up

what card? full model numbers only work/.
is it a used card? or new?
did you leave off the yellow wire connector? if present.
quadra tells the helper ZERO. google that name , endless cards.
all very different..

the card is bad (test it in other pc?)
or the wrong card
or the wrong slot used.
the extra power cable , ignored, oops that is super bad. error.
that MOBO has 4 slots ,which one

buttom up
pci-e x1
pci-e x1
pci--e X16

what?; and tell full spec on card, a photo works or link to same.
why post lacking full card spec.>>>??
vast video cards exist. powerful ones have aux power cables.
the card has manual read it yets
top end card tells you to change the PSU, for AMPS
if you dont, do as it tells you ,there IS NO HOPE ever.
here is one, that sucks, power
Maximum power consumption: 250 W (just the card !!!)
this card has the 8 pin yellow wire aux connector if not fitted, it fails
if you dont have 500w PSU or larger it a doomed thing,


Sep 25, 2017 | HP 500B MT PDC27 3GB 500GBDVDR W7P SBY...

1 Answer

Hp pavilion a1330n fan runs, nothing else happens

A lot of HP Pavilion laptops suffered from improperly installed VGA chips on the motherboard which did not have properly thermal control. Overtime the chip will partially or entirely lose contact from the motherboard and you will experience this symptom.

This started with early 2007ish Pavilion DV2000, 6000, and 9000 series laptops, but has been an ongoing issue in several models since. A repair is possible, but NOT by baking your motherboard or using a thermal heatgun.

You need to take it to a lab with an infrared REFLOW machine to properly REFLOW the solder from the VGA chip to the motherboard. Going rates are from $75 to $150 flat for the job.

Good luck

May 27, 2012 | HP Pavilion a1330n (EL466AA) PC Desktop

2 Answers

I have a hp a1210n computer and i went to turn it on the other day and it turns on fans go high speed, I hear the hard drive ticking, but all i hear is a beeping sounds stays on for a second the stops for...

Often that will happen if the memory (RAM) is not seated properly. Unplug the machine and open the box. Find your RAM and make sure it is firmly seated. Plug in machine and turn on.
I have seen one situation where the machine couldn't find a keyboard and did the beep sequence.

Good luck.
Semper Fi,

Feb 19, 2018 | HP Pavilion a1210n (ED895AA) PC Desktop

1 Answer

Computer does not display any boot screen, although it turns on. no USB ports work, not do any other inputs on the rear of the machine. this was done after migration of parts to a new case for the...

DC5000MT (i think you left off the"T" right?) MT=mini-tower then.
they at SFF then too.
old old desktop pentium 4, with pata hard drive?
no monitor stated, make nor model #
no vga card stated.

migrating? oops.. why do that? nor if PC ran before?
NO OS stated,? windows XP what? (it came with XP)
ok the mobo turns on with case power button?
and the CPU fan spins fast, as does PSU fan?

what does USB ports mean>? using what there?
PS/2 keyboard. using that? or pS2/mouse?
does it beep:?
are you sure the monitor is ok?
if monitor is ok ?
and PSU and 1 stick of ram is ok
the BIOS screens work.
or the PSU
does this mobo have onboard VGA jack GPU:>
if yes, try both it and PCI video card.
and 1 stick of ram at a time. slot1, bank 0

Aug 12, 2017 | HP DC5000M PC Desktop

1 Answer

Sr181nx compaq presario won't boot up

why do this expensive first.?
Its just a desktop, (and industry standard and easy to fix)
why not a PSU first. vastly more cheap.

i cant see that video card, it has name and model number
and that matters big time if the card uses more that 75watts.
(wrong PSU for the newer faster video card is doomed)

you failed to say what the problem was before, the card.
same,or just wanted faster video for say gaming.
tell why the new card, history also matters and intents.
lets do this the easy way. a list.

the unstated monitor and number of it, never ever shows any text ever at any time.
Blank to me means that, other say blank means windows dead.
(totally opposite in facts)
1: so you push the PC cases power button,
a: the PC is silent. ? (power cord connected, and any switch hear that cord entrance(1/0) is in the 1 position = on.
b: the PC PSU fan runs now, it must or the PSU is dead.
(answers are 99% the other 1% i handle in all cases(complex)
we use a voltmeter to test power, in all cases.
c: the PSU fan blows, (looking behind it in the PSU grill.)
not packed in lint and stalled, or dead.
d: the CPU fan blows, (slide lid off eyeballs on it)
e: the CD tray ejects on command, if this all happens 12v and 5vdc are working, yes it takes more.

in each case of testing above what fails , causes me to work that angle, that path, of power and logic inside.

if the PSU fan never spins even for the magic 1 second rule.
then the PSU is bad.
the exception is if things inside the case are shorted.
shorts cause all ATX class PSU made to shut down
(stops a fire ) (some do this for any overload, overvoltage and any undervoltage condition, I call those PRIME PSU's (best)

This is normal for short.(inside)
to find shorts, we remove things from the inside if the case
called stripping PC. down.
first HDD (just power cable)
next CD (same just powercable
next the Video card, pulled, oops PSU now stay on, oops.
next all ram pulled. PC may beep due to missing ram. but power goes one. and may stop but you saw power happen.

last is the jumper test of a PSU.
we unplug the PSU. 24 pin connector.
then jumper as see here.
pin 16 to 17
pull the conn,. and psu end jump it.
turn on PSU and it must run its fan full time.
it will have all the voltages seen here.

Mar 04, 2018 | HP Compaq Presario SR1810NX PC Desktop

Not finding what you are looking for?
HP Media Center m7250n (ED842AA) PC Desktop Logo

Related Topics:

1,108 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18424 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers


Level 3 Expert

538 Answers

Are you a HP Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides