New Computer Wont Boot!

New Power Supply installed, computer won't boot up ...

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Tom's Hardware Guide
May 22, 2013 - 6 posts - ‎2 authors
I have recently received my new power supply, i was very excited for it and just finished installing it. ... those were already 100$ on both the powre supplies, i don't want to .... Do you have another computer around that works?

New power supply now computer won't turn on [Solved ...

www.tomshardware.com > Forum > Components

Tom's Hardware Guide
Jan 22, 2014 - 3 posts - ‎2 authors
Bought a new 500W power supply to replace the one of the same wattage. I wanted to ... This should turn the PSU on and the fans should work.

pc not booting after installing new power supply (pictures ...

Try resetting the CMOS. You may do so by temporarily removing the CMOS battery and place it back.

For non-BIOS issues:

If you did not try to update BIOS before the problem started then try these troubleshooting steps.

1. Full power down. Unplug the power cord from the Power supply. Then hold down the pc power button (this discharges any residual power in the capacitors).

2. Open the case and reseat the graphics card, hard drive, and RAM.

3. Take out one of the RAM sticks if there is 2 or more. Swap the RAM sticks in different RAM slots. Try one stick at a time to see if you can get the PC to boot. If this works, then the remaining ram sticks are damaged.

4. Set the Cmos jumper to clear. Power up the pc. Power down the PC. Set the Cmos jumper back to normal position, power up the PC.

5. Unplug and replug all the power supply cables.

6. Check the powersupply function. Either by a powersupply voltage checker (20-25 dollars at local PC shop), get the supply tested at a PC shop (usually a free service), put the powersupply in a different pc, or try a different powersupply in the problem computer.

If the Powersupply checks out ok, then you will have to do a process of elimination to find out what part or parts are the culprit of the No-Boot.

Start by pulling all the ram sticks if you have not already. This is the easiest components to check and usually a culprit.

Take out one of the RAM sticks if there is 2 or more. Swap the RAM sticks in different RAM slots. Try one stick at a time to see if you can get the PC to boot. If this works, then the remaining ram sticks are damaged.

If it is not the RAM, you have to continue removing items such as sound cards, un-plugging hard drives and optical drives, other PCI cards. Do this one at a time until you find the culprit. If a POST screen, meaning you can see Anything from the PC brand name to Motherboard brand name appearing on the screen. The PC may not boot to windows, but it Does post at this point, and with that the problem is resolved. If windows does not load, then you have a new problem. Best dealt with asking a new question.

Good luck!
Brian

Did you plug in the 4-pin ATX power cable from the power supply, to the motherboard? It's the power for your Intel processor. Looks like this, http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

This could be several problems in order of cheapest to most expensive:
Memory: Take out the RAM and re-seat it, apply even but firm pressure. Try to boot again. If this does not work...
Power Supply: Your power supply might be dead, try to pick up a brand-name one and boot once more...
Motherboard: This is the worst case scenario, your motherboard went poof buying a new computer might be better than buying a replacement motherboard.

have you checked the frequency of the new ram you are using if its not of the same type and of same frequency as of the another one your system wont boot

The first thing you should do is swap the power supply for a known good one,
If this is a new build that hasn't worked from the start follow the instructions here:
http://forum.pcmech.com/showthread.php?t=132409

You need to do a BIOS Upgrade. First get the name of your BIOS when the computer boots up. Then go to the we site and find your BIOS brand and get a version update or upgrade.

Be VERY careful and follow the directons to the letter.

Let me know if this helps.

Jack

Swap the power supply since you got two systems?

I recommend that you replace the PSU, Power Supply Unit with a new one, this is a simple task. Remove the plug from Motherboard remove the four screws from the PSU at rear and get a replacement one say a 450 Watt job. Install and ya be good to go.