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No power in cpu

All the components & wires are connected but there is no power in cpu

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  • ardied2003 Feb 25, 2009

    how can that be? i got this less than a year..

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Check your powere supply may be it damage change your power cable first then change just power supply ok best of luck .

Posted on Feb 24, 2009

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My computer not beeping when ram is removed


1.Did you carefully read the motherboard owners manual?


2. Did you plug in the 4/8-pin CPU power connector located near the CPU socket? If the motherboard has 8 pins and your PSU only has 4 pins, you can use the 4-pin connector. The 4-pin connector USUALLY goes on the 4 pins located closest to the CPU. If the motherboard has an 8-pin connector with a cover over 4 pins, you can remove the cover and use an 8-pin plug if your power supply has one. This power connector provides power to the CPU. Your system has no chance of posting without this connector plugged in! Check your motherboard owners manual for more information about the CPU power connector. The CPU power connector is usually referred to as the "12v ATX" connector in the owners manual. This is easily the most common new-builder mistake.

3. Did you install the standoffs under the motherboard? Did you place them so they all align with the screw holes in the motherboard, with no extra standoffs touching the board in the wrong place? A standoff installed in the wrong place can cause a short and prevent the system from booting.

4. Did you verify that the video card is fully seated? (may require more force than a new builder expects.)


5. Did you attach all the required power connector(s) to the video card? (some need two, some need none, many need one.)

6. Have you tried booting with just one stick of RAM installed? (Try each stick of RAM individually in each RAM slot.) If you can get the system to boot with a single stick of RAM, you should manually set the RAM speed, timings, and voltage to the manufacturers specs in the BIOS before attempting to boot with all sticks of RAM installed. Nearly all motherboards default to the standard RAM voltage (1.8v for DDR2 & 1.5v for DDR3). If your RAM is rated to run at a voltage other than the standard voltage, the motherboard will underclock the RAM for compatibility reasons. If you want the system to be stable and to run the RAM at its rated specs, you should manually set those values in the BIOS. Many boards don't supply the RAM with enough voltage when using "auto" settings causing stability issues.


7. Did you verify that all memory modules are fully inserted? (may require more force than a new builder expects.) It's a good idea to install the RAM on the motherboard before it's in the case.


8. Did you verify in the owners manual that you're using the correct RAM slots? Many i7 motherboards require RAM to be installed in the slots starting with the one further away from the CPU which is the opposite of many dual channel motherboards.


9. Did you remove the plastic guard over the CPU socket? (this actually comes up occasionally.)


10. Did you install the CPU correctly? There will be an arrow on the CPU that needs to line up with an arrow on the motherboard CPU socket. Be sure to pay special attention to that section of the manual!


http://www.intel.com/cd/channel/re [...] 299985.htm


11. Are there any bent pins on the motherboard/CPU? This especially applies if you tried to install the CPU with the plastic cover on or with the CPU facing the wrong direction.


12. If using an after market CPU cooler, did you get any thermal paste on the motherboard, CPU socket, or CPU pins? Did you use the smallest amount you could? Here's a few links that may help:


Benchmark Reviews


Arctic Sliver


http://www.youtube.com/watch?v=ffK [...] re=related


13. Is the CPU fan plugged in? Some motherboards will not boot without detecting that the CPU fan is plugged in to prevent burning up the CPU.


14. If using a stock cooler, was the thermal material on the base of the cooler free of foreign material, and did you remove any protective covering? If the stock cooler has push-pins, did you ensure that all four pins snapped securely into place? (The easiest way to install the push-pins is outside the case sitting on a non-conductive surface like the motherboard box. Read the instructions! The push-pins have to be turned the OPPOSITE direction as the arrows for installation.) See the link in step 10.


15. Are any loose screws laying on the motherboard, or jammed against it? Are there any wires run directly under the motherboard? You should not run wires under the motherboard since the soldered wires on the underside of the motherboard can cut into the insulation on the wires and cause a short. Some cases have space to run wires on the back side of the motherboard tray.


16. Did you ensure you discharged all static electricity before touching any of your components? Computer components are very sensitive to static electricity. It takes much less voltage than you can see or feel to damage components. You should implement some best practices to reduce the probability of damaging components. These practices should include either wearing an anti-static wrist strap or always touching a metal part of the case with the power supply installed and plugged in, but NOT turned on. You should avoid building or working on a computer on carpet. Working on a smooth surface is the best if at all possible. You should also keep fluffy the cat, children, and fido away from computer components.


17. Did you install the system speaker (if provided) so you can check beep-codes in the manual? A system speaker is NOT the same as normal speakers that plug into the back of the motherboard. A system speaker plugs into a header on the motherboard that's usually located near the front panel connectors. The system speaker is a critical component when trying to troubleshoot system problems. You are flying blind without a system speaker. If your case or motherboard didn't come with a system speaker you can buy one for cheap here: http://www.cwc-group.com/casp.html



18. Did you read the instructions in the manual on how to properly connect the front panel plugs? (Power switch, power led, reset switch, HD activity led) Polarity does not matter with the power and reset switches. If power or drive activity LED's do not come on, reverse the connections. For troubleshooting purposes, disconnect the reset switch. If it's shorted, the machine either will not POST at all, or it will endlessly reboot.

19. Did you turn on the power supply switch located on the back of the PSU? Is the power plug on a switch? If it is, is the switch turned on? Is there a GFI circuit on the plug-in? If there is, make sure it isn't tripped. You should also make sure the power cord isn't causing the problem. Try swapping it for a known good cord if you have one available.


20. Is your CPU supported by the BIOS revision installed on your motherboard? Most motherboards will post a CPU compatibility list on their website.


21. Have you tried resetting the CMOS? The motherboard manual will have instructions for your particular board.


http://www.spotht.com/2010/02/rese [...] -cmos.html


22. If you have integrated video and a video card, try the integrated video port. Resetting the bios, can make it default back to the onboard video.


23. Make certain all cables and components including RAM and expansion cards are tight within their sockets. Here's a thread where that was the cause of the problem.

hope this helps


Oct 06, 2012 | Dell Vostro 230 PC Desktop

1 Answer

Why is my monitor dont show any display when connected to cpu?What just noticed is that,power light blinks as if in sleep mode


Because your cpu or other component in there has died and will have to be replaced.
Time to take the cpu (not the monitor) to a pc repair shop.

Sep 06, 2011 | Computers & Internet

1 Answer

I need to get step by step instructions on how to set up my brand new computer by hewlett Packard, it has a hard drive. i do not want to pay someone to do it for me. can i print instructions off of the...


ok first put the cpu in place where it it is realy comfortable to use, then you need to assemble the lcd that come with it you can see the manual for the lcd how to assemble. then connect the power of the lcd at the back, now check at the back of the cpu for the graphics connector. if it is color blue or white if white look for the cable in the box of the lcd that comes with it connect it to the cpu, the other end must be connected to the lcd at the back, be sure you arrange all the wire first after connecting, now connect the keyboard in any usb port at the back of the cpu, and so on with the mouse, then look for the power cord for the cpu the one with a white tape on it , plug it in the back where it fit in the power supply of the cpu, now plug the two wire to the avr or ups if you bought them, the power cord from cpu and the power from the lcd plug them both, then your ready take care!

Aug 03, 2011 | HP Computers & Internet

3 Answers

Will not power on.


check the power supply
and the power button

May 12, 2011 | Compaq Presario SR1810NX Sempron 3200+ 1.8...

2 Answers

Computer shuts down by itself


There can be many reasons of unexpected shut down of your system.Below are some remedies to solve it

1
Run an anti-spy ware and anti-virus utility to make sure that the shutdowns aren't being caused by a malicious program. If the shutdowns are infrequent, install a CPU temperature monitor utility to keep track of the CPU's temperature. If the CPU is overheating, or the shutdowns are frequent, then you will need to troubleshoot your computer's internal components.

2
Check any recently installed internal components to ensure that they are properly connected to the computer's motherboard. Make sure any new expansion cards or memory modules are securely seated in their slots, and ensure that the power and data cables are properly connected to any new drives.

3
Check for large dust buildups on your CPU fan. If the fan isn't effectively cooling your CPU, the overheating CPU will cause your computer to power off. Carefully pick away large pieces of dust with your fingers, and then spray the CPU fan with a can of compressed air to remove the rest of the dust.

4
Reapply the heat sink compound between the CPU and heat sink if the computer continues to turn off unexpectedly. Heat sink compound is a pasty substance that fills the space between the heat sink and processor, which increases the heat sink's ability to absorb heat from the CPU. But worn heat sink compound won't properly redirect heat away from the CPU. Power down your computer, disconnect its power cables and open the case. Unplug the CPU fan's power cable from the motherboard, remove the heat sink and fan combination from the CPU, and then apply the heat sink compound to the CPU--refer to your product manuals for details on reapplying heat sink compound.

Thanks .
Have a great day.

Oct 03, 2010 | Dell Inspiron 537s PC Desktop

1 Answer

Dell PC won't start


No beeps are heard, no CPU fan is turning on, only blinking yellow light. This brand usually experiences this problem.
  1. First, check the power supply. Disconnect connectors from the board and make a jumper wire for the green wire to any black wire. If the PS fan does not spin then it's busted, else proceed below.
  2. Reconnect connectors except the one with 4 wires, 2 yellow and 2 black, then switch on. If CPU fan turns on then you have a bad processor.
  3. If the fan is still not turning on then check the USB port pins for short circuit.. disconnect it from the board and switch on.
  4. Do the same with other hardware connected to the board.
PS: The metallic casing of computers must be connected to the common ground of the power utility to protect it from stray currents that result to damage of sensitive components such as processors, memory and hard disks.

Sep 26, 2009 | Dell Dimension E521 PC Desktop

2 Answers

Yellow light on power button keeps blinking but doesn't boot.


No beeps are heard, no CPU fan is turning on, only blinking yellow light. This brand usually experiences this problem.
  1. First, check the power supply. Disconnect connectors from the board and make a jumper wire for the green wire to any black wire. If the PS fan does not spin then it's busted, else proceed below.
  2. Reconnect connectors except the one with 4 wires, 2 yellow and 2 black, then switch on. If CPU fan turns on then you have a bad processor.
  3. If the fan is still not turning on then check the USB port pins for short circuit.. disconnect it from the board and switch on.
  4. Do the same with other hardware connected to the board.
PS: The metallic casing of computers must be connected to the common ground of the power utility to protect it from stray currents that result to damage of sensitive components such as processors, memory and hard disks.

Sep 24, 2009 | Dell Dimension 5150 (DIM515MIN) PC Desktop

1 Answer

Yellow blinking light and no power


You did not specify the brand but I assume it's a Dell and no beeps are heard, no CPU fan is turning on, only blinking yellow light. This brand usually experiences this problem.
  1. First, check the power supply. Disconnect connectors from the board and make a jumper wire for the green wire to any black wire. If the PS fan does not spin then it's busted, else proceed below.
  2. Reconnect connectors except the one with 4 wires, 2 yellow and 2 black, then switch on. If CPU fan turns on then you have a bad processor.
  3. If the fan is still not turning on then check the USB port pins for short circuit.. disconnect it from the board and switch on.
  4. Do the same with other hardware connected to the board.
PS: The metallic casing of computers must be connected to the common ground of the power utility to protect it from stray currents that result to damage of sensitive components such as processors, memory and hard disks.

Aug 06, 2009 | Computers & Internet

1 Answer

Cpu doesnt work


Dear Zalrashdi20,
When you say that the CPU doesn't work, what happens exactly? Does it not power on OR There are beep sounds heard OR there is an error on screen that you would like to share? OR ...

Assuming that the machine is not powering on at all .. here are few checks that you would like to perform...
  1. There is a toggle switch (Voltage selector) at the back of the computer on the power supply unit, just besides where you connect the power cable .. make sure that appropriate voltage is selected.
  2. Try connecting the computer to a different wall socket.
  3. If computer is connected through the Surge protector or UPS then try connecting it directly to the wall socket.
  4. Try using a spare power cable if available.
  5. Remove all other connections apart from Power supply, keyboard, mouse and monitor and see if that makes any difference.
  6. Remove the power supply cord from the back of the computer and press and hold the power button for few seconds .. this would drain the accumulated power from the CPU components .. now reconnect the power supply and see if that makes any difference..
  7. Open the chassis and see that couple of wires run from behind the power button on the CPU to the big circuit board (Motherboard) .. make sure that the wires are properly secured.
Perform these basic checks and let me know and I would glad to assist you further.

Regards,
Srinivas

Jun 21, 2009 | E-Machines (T2824) PC Desktop

1 Answer

Hp pavilion 764c wire diagrams


Take a picture of the inside of your computer and put it up on the website with the wire connectors that need to be connected. The connecting wires should be in four groups. 1. The power supply connectors. These connectors will supply power to to all the power using components not supplied power by the motherboard itself. 2 The connections to the other components in your system like the dvd/cd player and the harddrive and floppy drive.3. The motherboard connections for the case. The power switch connector andreset switchconnector. The power led and theharddrive activity light.The USB connector and the audio connector.The fan connections like the cpu fan and other fan only connectors found on the motherboard.The external fans ( Fans that need to be connected to the power supply).Most of these connections are labeled on the motherboard. The case connectors also should be labeled for the correct connection. The best way to find the answers to this hook-up, may be to call HP pavilion with your computer make and model number,motherboard model number including revisions number. Computer made by big manufacturers tend to have may revisions and the only way to make sure your are getting a correct hook-up to the motherboard is call them for assistance.Especially if the motherboard and case labels are not present or so small that they cannot be read.Hope this helps you with your problem.

May 16, 2009 | HP Computers & Internet

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