Go Premium for a chance to win a PS4. Enter to Win


Fans run when computer is plugged in, but PC won't boot??

Posted on 2008-10-07
Medium Priority
Last Modified: 2012-05-05
This is strange.  When you plug in this computer the fans start running and the hard drive spins.  (The power button has not been pressed.)  When you push the power button the rear case fan stops running.  The computer never boots, but it does seem like the power supply is getting juice to all the devices.

Here's what I've done so far . . . the power supply has been replaced since that was the low hanging fruit.  All of the cards, HD, and other connections have been pulled so those devices aren't interfering.  Same result.  At this point it looks like it's either the mobo or the cpu.  I'm waiting for a replacement mobo tester in the mail, so in the meantime any probability it's one vs the other?  This computer is less then 1 year old so neither of these parts should be an issue, but stranger things have happened.  

Question by:cunninw
  • 4
  • 2

Expert Comment

ID: 22665435
You seem to have gone through all the steps.
Are you looking for bets: MoBo against CPU?
Less than 1 year? I wouldn't have bothered & just sent the whole thing for warranty replacement.

Author Comment

ID: 22665603
Sure, I'll take bets . . .

From a practical perspective II think I'm going to try a replacement CPU first since that's the easiest to put in and out.  

Accepted Solution

Grizzly072000 earned 1500 total points
ID: 22665621
From experience, I'll bet for the board....
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.


Expert Comment

ID: 22665638
Oops: I realised we have forgotten about the memory. Please run Memtest or equivalent (He he..., much easier than replacing a CPU)

Author Comment

ID: 22665720
I've switched memory in and out AND in and out of different slots.  I can't get anything on the screen or the computer to turn on for that matter so I can't run memtest (or I would have).

I'll let you know.

Expert Comment

ID: 22665976
Did you try resetting the CMOS (Jumper or remove battery for 30 min.)?
No POST beep(s)?

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is an article based on some fact, and much personal opinion. While you may differ from me in the things you value in a personal computer, I hope this advice can serve to inspire a more objective comparison of two computers, help your figure out…
This article is a cursory discussion of Intel SpeedStep Technology (SpeedStep) and Enhanced Intel SpeedStep Technology (EIST).  The goal is more to illuminate what these technologies are and are not.  The detail of how each technology works is not a…
The viewer will learn how to successfully create a multiboot device using the SARDU utility on Windows 7. Start the SARDU utility: Change the image directory to wherever you store your ISOs, this will prevent you from having 2 copies of an ISO wit…
The viewer will learn how to successfully download and install the SARDU utility on Windows 7, without downloading adware.
Suggested Courses

885 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question