Question about HP z540 Digital Entertainment Center PC Desktop

1 Answer

No power too PC

I have an HP z540 Digital Entertainment Center with standard hardware, that will not start up. The PC was running fine until I removed the cover and replaced it, since then I'm getting a big zero out of it. No response at all when I press the power button. When I removed the cover I sprayed the inside out with an air can, I did not touch or remove anything. I did a proper shut down and unplugged it before I did so. I'm guessing that I loosed a wire inside, but I can't find a wiring diagram for the motherboard. Help and Thanks.

Posted by on

  • 1 more comment 
  • jwhill25 Mar 02, 2009

    I held the can pretty far back so I don't think any liquid came out. I was very careful to stay grounded the entire time. This case and motherboard are pretty non-standard but I don't see any green or other LED lights inside when it's plugged up. One thing I do notice with the case off is a green plastic piece that extends from the CD-RW mounting which seems to make contact with a metal arm from the top case. Near that green piece is an red wire "AWM style 30v etc" that is plugged onto the mother board but un-connected on the other end. It's close enough to the unknown green piece that the metal arm from the case could have unplugged it. The red wire is very short and I have checked for any possible place it could connect with no luck. (Yes, I just noticed the red wire and should have seen it before).

  • jwhill25 Mar 04, 2009

    A power surge here (south pacific) is very possible, but I keep the PC on an surge protector at all times. Prior to my meddling the PC had no problems so I'm inclined to think the problem came from my removing the cover. If anyone knows where I could find a wiring diagram that would be very helpful.

  • Chris Thompson May 11, 2010

    When you sprayed the air did anything liquid come out of the can?....also did you ground your self to the case before you opened it? Does a green LED light come on when plugged up....the green light will be on the mother board.



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 4 Answers

That LED light that is not coming shows that your motherboard is not getting any power. Heres the 2 things I would do....

1) Replace your motherboard and if that does not fix it...2) Replace your Power supply.....

Have you recently had any power surges in your area?

Posted on Mar 02, 2009

  • Robert Hale Sep 16, 2013

    Replace the Power Supply first. 19 times out of 20 thats the problem and it is usually cheaper than a motherboard.



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

a 6ya Technician can help you resolve that 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 repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

My HP Media Center PC m1180n had been running fine. I just went to shut it down and after it powered off, I saw a spark come from inside the tower. No there is no power to the PC. Any help would be...

I've had this happen and was able to resolve by removing the power cord for about a minute.
If still nothing, remove the side panel and inspect the motherboard for melting or charring. If you see some you will need to replace the motherboard, if none is present, start by replacing the power supply. Still nothing then it's motherboard replacement
There is a possibility the spark fried more than just the motherboard.

Comment back if you need clarification or more help.

Sep 14, 2011 | HP Media Center m1180n PC Desktop

1 Answer

My HP Pavilion dv7-3163cl entertainment laptop with windows 7 has a problem when ever i plug it into the power. i play a game on it and it runs fine until i plug it in and it will blank screen while in the...

You could have a virus in it,,,Download spybot for free,,,,and Malewarebytes both have free versions
Than run them to check everything out. And run them in safe mode

Mar 07, 2011 | HP Computers & Internet

1 Answer

HP m7250n shuts down unexpectedly.

your power supply is faulty you will need to replace it. If you recently installed a new hardware it could be you don't have enough power to, either upgrade you power supply or remove the hardware.

Feb 27, 2010 | HP Media Center m7250n (ED842AA) PC...

1 Answer

Power supply failure -- can't find replacement!

Check for part number HP 5187-8274, this has been replaced by part number HP 5188-2621 both are available from several suppliers.

Jun 27, 2009 | HP z545-b Digital Entertainment Center PC...

1 Answer

My HP Pavilion Entertainment PC will not turn on!


Jun 07, 2009 | Microsoft HP Pavilion DV6276US Notebook PC

2 Answers

Screen black computer laptop not starting ,hp pavillion entertainment pc,power lights on but screen black screen black computer laptop not starting ,hp pavillion entertainment pc,power lights on but screen...

if nothing(even hp logo ) is not coming on the display then please try this.
1.remove the battery and then press the power button for 30 sec.Again refix it and check.
2.If windows sound is there then this mught be the issue with display.

3.If there is no windows sound might be the issue with RAM so please get it checked.

May 29, 2009 | Microsoft HP Pavilion DV6276US Notebook PC

4 Answers

Hp nc 6000 wont power up

your power supply may be going
not getting enough power

Jan 13, 2009 | HP Compaq nc6000 Notebook

2 Answers

I have a wireless keyboard, model #9129URF that I need software to connect to my new computer. Can it be downloaded from your site?

This is a special 49Mhz frequency keyboard and needs the built-in hardware (found in the Z540, Z545, Z555, Z560 and Z565 media centers). If you do not own one of these, the software will load but not work...

Oct 28, 2008 | HP Computers & Internet

Not finding what you are looking for?
HP z540 Digital Entertainment Center PC Desktop Logo

97 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18411 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