No BIOS beeps, no boot

Posted on 2004-04-28
Medium Priority
Last Modified: 2010-04-25
Hi there! I workn in the tech lab at my school, and we have several computers with this problem...
The computer will power up fine, but there is no bios beep (the speaker is hooked up properly) and there is no video output--the monitor says "No Signal".
I've been told by some of the other guys that the board nees to be "Jumped"--what does this entail?
thanks for your time!
Question by:ACHSTechNav

Expert Comment

ID: 10940579
a battery and some cables...nah

troubleshoot it...when you turn it on what happens? Fans spin up? HDD spin up? CD's spin up?
cables in their correct place?
What type of graphics card is used? PCI,AGP or onboard? Is there more than one (ex. AGP and onboard)? are you plugged into the correct one?

The no signal....start looking at why. Have you tried the monitor on a working computer? If it works then follow the cable to the PC. right spot? bent pins? follow it inside..seated?

lots of reasons...some work on your part.


Author Comment

ID: 10941699
OK, here goes...
Everything powers up. the fans, the CD, the HDD, and all the cables are correct. the little LED light next to the video card even powers up.

The Videocard is AGP, I think... it doesn't fit into the stardard PCI slot...there's only one, too...

The monitor works with other comupters, too...

For the record, it seems that these computers work fine, then, for no reason apparent to us at this time, it dies and starts exhibiting these symptoms. All the removable hardware appears to be working perfectly, but the computer doesn't want to start up. I *think* it has something to do with the mobo, but what, I don't know...

for the record, I did switch the onboard CMOS battery.
LVL 10

Accepted Solution

Snowguy earned 90 total points
ID: 10942023
I would try a known good power supply on them.
The fans and drives run on 12v. The power supply has 3 voltages 12v 5v and 3.3v. If you loose the 5v or 3.3v it can still act as if it is powering up.  What happens is you don't get power to ram vga or cpu. this is why when the PSU dies or is weak you usually don't get any post warning beeps or video.

 This is how I check a no post pc with out bios beeps. Remove All unnecessary hardware. But Cpu 1 stick of RAM (unles it is RDram needs to be a pair) and video card.  Verify power supply is working (very important step).  Verify System speaker is properly attached.
If no go and no beeps replace cpu with a known to work cpu or test on known working system
If no go and no beeps replace motherboard.
By now you should  get POST or a warning beep of some type.
Be it ram or video.

Expert Comment

ID: 11714136
I betcha you cooked your CPU.....
a few of my clients had the same symptoms

Featured Post

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.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Skype is a P2P (Peer to Peer) instant messaging and VOIP (Voice over IP) service – as well as a whole lot more.
How do you create a user-centered user experience on your website? And what are some things you should consider in the process?
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…
How to fix display issue, screen flickering issue when I plug in power cord to the machine. Before I start explaining the solution lets check out once the issue how it looks like after I connect the power cord. most of you also have faced this…

624 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