PC won't boot past first BIOS screen

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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?

You've exhausted all the possibilities and at least can rest assured you've left nothing on the table.

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.

Senobris said:

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.

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.