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Windows 7: PC won't boot past first BIOS screen

05 Apr 2015   #11

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

You are looking for a speaker that looks like this one:
Desktop Pc Computer Mainboard Case Internal Speaker Connector Plug DT -

If you have one you can test like this:
New System Failure Diagnostic

Basic diagnostic procedure is to uninstall the entire build and start over. Some people do this out of the case by placing the motherboard on an anti-static surface. This eliminates the possibility that there is a short circuit between the motherboard and the case through the connection posts (stand-offs). A standoff in the wrong location or a sloppy job will cause a short.

The Test (power off, power cord unplugged):
  • Disconnect everything externally connected except the mouse and keyboard (printers, USB devices, etc). If you are not using a wired mouse and keyboard see if you can borrow one. The wireless device is just another component you have to deal with.
  • Disconnect the power and data cables from all the drives inside the computer (Hard drives, DVD/CD drives, etc).
  • Remove all the cards installed in the expansion slots (PCI/PCI-e) including the video card. (Be careful handling them and place them on a non conductive surface while testing).
  • Remove all the RAM sticks (same rules as above).
Now connect the power cord and turn the PC on.
  • The motherboard should start beeping. You should get a beep code that tells you there is no memory. This is good, it means the processor is functioning and the motherboard is good so far.
  • Now add one stick of memory in Slot A1 and power on. More beeping: "no video card" beep code. This is good.
  • Then add the video card and connect it to the monitor. You should get no beeping and you should see the BIOS start screens, ending with the message that there is no boot device.
  • If you get no video then switch the one memory stick installed for another one and test.
  • If you do get video then start adding components back, one at a time, until the system fails to boot. The last component you added is then the problem component.
But what you may be looking at is a major motherboard failure.
If you are only running core components and have done the Clear CMOS procedure afterward and still no boot then you are either having a problem with one of those core components or some other component on the motherboard.

Have you tried each stick of RAM as the single stick?

My System SpecsSystem Spec
05 Apr 2015   #12

Windows 7 Home Premium 64 bit

Still no luck with finding a speaker, I'll have to buy one, but that won't be for a few days.

I hadn't tried the exact same setup as you mentioned, but tried it now, and no luck.

Thanks for the help so far, I really appreciate it, but I think I'll have to let it go for now until I can get my hands on a speaker.

Edit: posted this just after you made yor post.

I haven't tested each stick individually yet, no, I'll try that now.
And once I get my hands on that speaker I'll make sure to follow the procedure you've written out.

I guess I could try, for now, to take everything out and start from scratch, see if that fixes any possible shorts.
My System SpecsSystem Spec
05 Apr 2015   #13

Windows 7 Home Premium 64 bit

Each stick of RAM in A1 gave same result.
My System SpecsSystem Spec

07 Apr 2015   #14

Windows 7 Home Premium 64 bit

Small update.

I've gotten my hands on a speaker.

Plugged it in and did the test as described above.

I got a tone for missing RAM (long, short x 2)
I got a tone for missing VGA (long, short x 3)
I got a tone for starting up with both above intact (single short beep)

So the checks work, but I still can't get passed the BIOS POST Message.

After that I tested the PSU on a second PC, which seemed to do fine, so I'm pretty sure the PSU isn't the problem, which pretty much just leaves the mobo as cause.

Thanks for the help, but I'm off shopping for a new PC.
My System SpecsSystem Spec
07 Apr 2015   #15

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

You've exhausted all the possibilities and at least can rest assured you've left nothing on the table.
My System SpecsSystem Spec
08 Apr 2015   #16

Windows 7 Home Premium 64 bit

Yup, thanks again for the help!
Should I mark this thread as solved? Or leave it like this?
My System SpecsSystem Spec
08 Apr 2015   #17

Windows 7 Pro 32bit

Hi Senobris,

I have read the previous post, but didn't find this methods:

- Try another PSU.
- Make sure all connectors are tightly placed/connected.
- look for busted capacitors on the mobo.
- try power on the computer while HDD is disconnected.
- try booting with a CD or DVD.
- try taking out the CPU, check for bent pins. replace cpu paste.
My System SpecsSystem Spec
08 Apr 2015   #18

Windows 7 Home Premium 64 bit

Hi Shottas,

thanks for your suggestions:

- I don't think the PSU is the problem as it worked fine with another old computer; I don't have another PSU available to test on the broken mobo though
- I have replaced the connectors when re-assembling the PC from scratch
- I haven't really seen any obvious damage on the mobo, is there anything I should look for specifically? I haven't seen any capacitors that were loose or anything like that
- I have run a setup with just mobo and cpu + 1 stick of ram + vga, with same result
- Tried booting from CD but the BIOS doesn't even get to reading drives
- The PC worked for ~3 years, and I've never touched the CPU, doesn't that reduce the odds of it being something like bent pins? I've also checked for CPU heat through those years, to make sure I wasn't getting in trouble with dust buildup, and I have never experienced my PC shutting down due to heat issues.
My System SpecsSystem Spec
08 Apr 2015   #19

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

Quote   Quote: Originally Posted by Senobris View Post
Yup, thanks again for the help!
Should I mark this thread as solved? Or leave it like this?
Well, we never got the motherboard working again, so that is not solved. But if you have satisfied your concern that there might be something that could be done then I guess it is.
If you leave the thread open you might get some more good ideas to try from other members. But you also might get redundant questions from people who only read the title and don't read the whole thread.

When you mark a thread as solved it makes it much more prominent when it comes up in a search engine - people will read solved stuff first. So in general it is best to mark a thread solved if there is a solution there to be found. But lots of folks mark them solved just to close it out.
My System SpecsSystem Spec
08 Apr 2015   #20

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

One more thing:

You said you performed a Clear CMOS procedure (clearing the BIOS with the reset pins on mobo). I just want to check to see if you performed it the best way.
Below is the standard procedure. Note: CLRTC and Clear CMOS is the same thing:

  • Note all your current BIOS settings (not applicable in your case)
  • Shut down the computer > remove the power cord.
  • Remove the 3v motherboard battery.
  • Move the CLRTC jumper from pins 1-2 to 2-3.
  • Touch a metal part of the case and Press and Hold the reset button for approx. 30 seconds or more to discharge all power from the board.
  • Put the CLRTC jumper back on pins 1-2.
  • Replace the 3v battery > replace the power cord > boot.
  • Immediately go back into BIOS and reset all your preferred settings. If the CLRTC worked you will need to reset the date and time in BIOS.
If that does not work (or that is what you already did before) then try the procedure again, only this time don't put the jumper back on pins 1-2. Leave it off completely. Then try booting.
My System SpecsSystem Spec

 PC won't boot past first BIOS screen

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