Question about Compaq Presario S5100NX (E120866) PC Desktop

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Wont stay powered up

Replaced power unit because old one died, now powers up,cpu fan comes on,hear a beep then all goes back off in a time frame of about2 -3 seconds.

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Plz check with a new power unit if the problem remains then *********** board needs servicing

Posted on Jan 13, 2009

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1 Answer

Computer shut off by itself and now wont come back on?


Does it beep? If you know how to install memory try removing all memory then power on do you hear beeping?. Install one of the memory try power on. Make sure CPU fan is working.

Oct 19, 2014 | HP Compaq Presario SR5350F Desktop PC...

1 Answer

Hi i have an r630 desktop and it did work but now i have no power to motherboard no fans cpu but i do have power to the hard drives and rom replaced power supply same problem


Maybe your motherboard is toast.

When you plug in the power cord is there any lightswhatsoever on the laptop, where the plug goes in or on the AC Adapter of thepower cord?

When you press the power button do you hear fans running, hard drive spinning,lights on the computer, hear any beeps or lights constantly blinking, hear theDvD/CD drive click and the light on the drawer of the DvD/CD turn on for asecond or two? If so the laptop is trying to boot or may have booted, butthe screen is not showing for some reason.

Beep tones and blinking lights tells the technicians what is going on with thelaptop and why it is not booting. Most times it's a motherboard issuewhen you hear beeps or blinking lights continuous.

Maybe your power cord is bad if you don't get anything to happen whatsoeverwhen you press the power button. And if that's true maybe you wasoperating off the battery the last time you had it on and since the power cordis bad, it was not charging the battery so the battery is drained and the powercord is bad.

Maybe you have a Static Charge Buildup. Remove the Power Cord, Remove theBattery, then Press and Hold the power button for 30seconds. After 30 seconds plug the power cord back in (leave the batteryout) and hit the power button to see if it boots. If it does, you can putthe battery back in and let it charge.

Mar 30, 2012 | Computers & Internet

1 Answer

Cpu fan works, power supply fan works why wont' computer come on?


Could be a number of reasons:
The CPu fan and the PSU fans will come on, even though the system is not working. There is a possibility that the CPU has blown, you can check this easily by (carefully) feeling the heatsink after it has been running a while. A dead CPU will not use power and therefore not heat up. If after say 10 minutes of running, the heatsink is clay cold, suspect the CPU. Replace with another one, spreading CPU grease on the top before putting the heatsink back on.

A blown CPU will usually be indicated bu there being NO beeps from the system (see below)

If the CPU appears to be generating heat, visually inspect the board, look for blown or blowing capacitors (the small cylinder like components) on the motherboard, any that are bulging or leaking a brown residue, or have blown, will render the motherboard inoperative.

If these appear ok (they still may be damaged), unplug all components except the hard drive, and ram and video card, see if the system then boots. If it does, proceed to re-installation of each in turn, until the faulty peripheral halts the boot.

Listen for any beeps as the ssytem switches on these beeps describe the type of problem
(repost if you hear any beeps)

Remove one stick of ram and try rebooting, if it works, suspect the ram module, try the other and see if that makes any difference.

Failing that, your last recourse is to power the system off, remove the bios battery, replace after 2 minutes and see if clearing the Cmos "unsticks" the computer.

After That, suspect the motherboard is dead.

Apr 25, 2011 | Computers & Internet

1 Answer

I have a Gateway 507gr pc. Pushing the power supply button the fans turn the cpu light turn on and the pc does nothing else.


you'll need a good power source.replace the old one ; remove all conection from hdd ,dvd's etc..make sure you have a speaker on MB.remove all the ram you have and power on the pc ;you must here a long beep folowed by 2 short one's;if you don't hear it your MB or CPU are gone.But if you do hear then put back the ram and remove your video card and power up the pc again , you must hear a long beep folow by 3 short one ; if you don't hear your MB or CPU are gone but if you hear that means the power supply was the problem.

Apr 21, 2010 | Gateway 507GR PC Desktop

1 Answer

Ccomponants will not power up


David,
Your hard drive is junk. Replace the hard drive.

May 23, 2009 | Computers & Internet

1 Answer

Getting power but wont boot up or anything


pull out everything in the computer except what's required to boot...so any pci cards or video cards (if you have onboard video). you can also try pulling out the ram (while unpowered AND unplugged) and then booting to hear beeps...if you pull the ram out and the computer doesnt make a sound, its probably a bad motherboard and needs to be replaced. if you hear beeps, try replacing the ram or disconnecting other parts...like harddrives, optical drives, modems and what not.

Apr 26, 2009 | E-Machines T2792 PC Desktop

1 Answer

System will not start up. Cpu fan spins once, then nothing.


It is more than likely that when your old power supply died a death, it damaged some components on the motherboard. Replace the Motherboard and chip, and you should be back in business. You can pick up some good value bundles to save money on buying the parts seperately. The power supply working again after turning off and on, is because there is a little trip in the power supply that triggers when it detects a fault. Powering down resets that trip allowing it to try and work again.

Mar 05, 2009 | MSI K7N2 DELTA2-FSR NVIDIA nFORCE2 ULTRA...

6 Answers

Computer wont boot hear one beep from motherboard over and over


If your power supply is bad, there is typically a much cheaper way to fix it rather than purchasing a new one.

If you know a little about electronics or know someone who does have them open up the power supply and check the capacitors. Often times when a power supply goes bad its the result of capacitors going bad.

If you notice on the ends of any capacitors a brownish/whitish discharge or "bulging" then the capacitor has gone bad.

A new one typically cost less than a dollar and replacing it is fairly easy if you know how to solder.

Let me know if you have anymore questions and hopefully if this is the case you can save some money.

Jan 19, 2009 | Acer Aspire (AST180-US340B) PC Desktop

1 Answer

E machine no power


Make sure the RAM is seated, the CPU, any video card and the Power supply is properly connected.

If you power it on, still get no POST (beep at startup from the PC speakers) its time to replace the motherboard.

Feb 01, 2008 | E-Machines eMachines Desktop PC

1 Answer

Compaq Presario 4400us


Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.

Jun 21, 2007 | Compaq (388746-001)...

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May 24, 2017 | AVG Computers & Internet

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