Continuous short beep when start... no boot up, already change the power supply and few rams for testing, but no change. should the motherborad or cpu fail?

if the beep is continuous it is likely the ram modules have dislodged.
however if it is just the normal short beep you get every time the computer starts normally, then it is just the post beep this simply indicates that the hardware has passed the Power On Self Test or POST for short. this would suggest the issue is windows related more so then hardware related, i would try using a windows 7 recovery or pe disk to boot it from.

Here are the beep codes for the Thinkpad:" Continuous beeping System board failure One beep; Unreadable, blank or flashing LCD LCD connector problem; LCD backlight inverter failure; video adapter faulty; LCD assembly faulty; System board failure; power supply failure One beep; Message "Unable to access boot source" Boot device failure; system board failure One long, two short beeps System board failure; Video adapter problem; LCD assembly failure One long, four short beeps Low battery voltage One beep every second Low battery voltage Two short beeps with error codes POST error message Two short beeps System board failure.

In your case, it is a memory problem. It's either one of your RAM has problem if you have 2 slot RAM. Please ensure that you have the right RAM for your board. You can also clean the contacts of your RAM by using eraser.
Below are the most common beep code that being adopted to most BIOS for reporting.

• short beep - Normal POST(system is OK)
• Steady short beeps - power supply problem
• long continuous beep - memory failure
• Steady long beeps - power supply problem
• 1 long, 2 short beeps - video card problem

It sounds like either a bad Hard Drive or your Motherboard is shot. Is there anything showing up on the screen when the computer is trying to boot up?

replace the ram

I can only cover generic test procedures since I do not have the specifications of your motherboard.
You will need a large antistatic bag or antistatic mat plus a ground strap and a power supply checker.
Check the power supply using a power supply checker. Disconnect the power supply unplug the power connector on the mother board and plug the connector into the power supply tester. If you do not have a power supply tester let me know how many pins are on the connector and I will tell you how to test it with a meter. If you have any voltage not present replace the power supply. If you do not have -5 volts it was used for ISA slots and was completely removed from the ATX standard in 2004.
Do you have an onboard video card? If you do is that the video output you intend to use or a external video card? If you have onboard video connect the monitor to the onboard video output. Disconnect the power supply cord from the computer and attach a ground strap from your wrist to the bare metal of the power supply. The down side of static damage to components is you do not always see the damage immediately since static can weaken components causing future failure. Remove all cards from the slots except the video card if you do not have the onboard video.Be careful to touch only the edges of the boards and place them on the antistatic mat in the antistatic bag. Plug the power supply back in and see if the Power On Self Test (POST) displays the boot process on screen or beeps are audible. The error beep codes can change from the BIOS types but these are a few generic ones. It would be best to check your motherboard manual for a complete listing of error codes.
1 short beep – System is OK
No beeps – Bad power supply or system board
Continues beep – Memory error
1 long two short beeps - display adaptor

If no video is displayed and no beeps can be heard, turn the system off by pressing the power button and unplug the unit. Verify the ground strap connection on your wrist and the bare metal of the power supply. Carefully remove the memory sticks handling only by the edges noting which slots they go in and which module was taken from which slot and place them on the antistatic mat or in the antistatic bag. Plug the power supply back in and see if a continues beep is audible. If yes, power off the unit and unplug the power cord. Put only one memory module in the first slot but do not put the same module in the same slot (swap them)if you have more than one module. Restore power to the system and see if the continues beep is no longer heard and you see video. If you see video and no continues beep than power the unit down and unplug the unit. Do the same for any other memory module which will help you determine if any modules are bad. This test is not a complete test but if any modules are dead you can identify them. If no video and no beeps the motherboard is the suspected problem.
If you have video and one short beep on power on and all memory checks good. Power down the unit and unplug the power to the power supply inset one of the removed boards and try to boot the system to see if you still have video. If you do power the system down and repeat the same procedure for each card. If you do not have video suspect that card is bad.
Good luck and be careful to always touch the bare metal of the power supply with it unplugged before reaching inside the computer and touching any boards.

Hard Drive is bad and probably needs to be replaced.
Good Luck...

Using the manual for the Gigabyte GA-945P-S3 MB. Go to page 71 & you'll see bios beep codes for your board: AWARD BIOS Beep Codes 1 short: System boots successfully 2 short: CMOS setting error 1 long 1 short: DRAM or M/B error 1 long 2 short: Monitor or display card error 1 long 3 short: Keyboard error 1 long 9 short: BIOS ROM error Continuous long beeps: DRAM error Continuous short beeps: Power error As you can see there isn't a code for three short beeps. When you boot your system try to pause your boot up screen. See if the bios is reporting the correct total of memory in your system. Bios codes from the link below. http://www.computerhope.com/beep.htm#05 3 beeps for the AMI bios code reports Base 64K RAM failure. You can test your memory. Go to memtest.org Scroll down the site to just under the three screen shots. Download Memtest86+ V2.11 You have a choice in making a bootable floppy disk or a bootable CD-ROM disk. Once completed you boot your system to the testing program. Memtest will check your system memory. This should help. Thanks for using FixYa! Mike

I think that either you have a bad power supply or it is not connected properly. I suppose it could also not be supplying enough power.

Try disconnecting all of the connections to the Motherboard and reconnecting them. Make sure they seat properly. Try a new power supply. You can get a good one from Newegg.com

The beep pattern is a beep code and is how the motherboard communicates errors during the early booting process otherwise known as the POST (Power On Self-Test). List restart the computer and listen for the pattern of short and long beeps. Soltek does not list the beep codes in their manual, instead they refer to Phoenix who manufacturers the AwardBIOS on your motherboard. There are only two POST beep codes; a single long beep followed by two short beeps (Video error) and anything else. Apparently anything else you hear *probably* refers to RAM problems. Since you?ve already tested both one of the remaining options is to install a *POST* card (about $30 to $50), boot the PC and read the hexadecimal error code for a more detailed clue to what failed. If you ask around you might find someone who has one and may be willing to loan it to you. Another option is to write off the motherboard since the cost of the test equipment it about 1/3 the cost of a new board. Let us know if you have any other questions and please don?t forget to rate the posing.