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PC has died !! I've disconnected all the HDDs, ROM, RAM, Video Cards and still dead. Power light comes on, CPU fan starts up, NO LIGHTS anywhere on the motherboard, two short beeps, followed by third beep. HELP !!!!

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Blown caps can cause memory read errors they can be replaced however a new mb would be a better long term choice in these cases, as more cascade damage could affect the mb in time

Posted on Jun 19, 2008

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Http://www.pchell.com/hardware/beepcodes.shtml


Find out what BIOS your motherboard uses and then consult the site to see what those beeps mean. BIOS beeps are the computers way of trying to tell us whats wrong. Honestly though. Sounds like a dead Motherboard.

Posted on Jun 19, 2008

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Based on your information the two beeps is an indication that you motherboard is alive and looking for a memory. is the video integrated or you use a separate video card? i think this has something to do with your video. if your video is integrated try putting in a video card

Posted on Jun 19, 2008

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1 Answer

Computer won't do anything, keyboard does not light up, screen is blank


So there is not so much as a BIOS message on screen? Any beeps?
If there is no life at all, you have a CPU/motherboard failure. This may be direct or indirect (e.g. no power to MoBo). Check your connections.
Otherwise, your boot device may not be operating. This is usually a dead or disconnected HDD. Check that it is plugged in. Does it get warm? Can you feel any vibrations from it? It should spin even if your cpu is dead but MoBo is alive.

Oct 26, 2012 | HP Compaq Presario SR2038X PC Desktop

2 Answers

Continuous beep and the systems is not coming up {boot}


Hardware problem:
* dead RAM
* dead video-card
* RAM not fully "seated" in its slot(s)
* video-card not fully "seated"
* dead fan on top of the CPU/heatsink.
* failing power-supply.

Jul 12, 2011 | HP Compaq dc5100 Small Form Factor PC...

1 Answer

Dimension 5100 wont start up .power led on MB is on changed mb.shorted out test done fan went.nothing else.what next ???


I have seen more than a few of these (Dimension 5100 series) die due to mainboard issues. If you haven't done so already, take out everything you can, (add-in cards, modem, disconnect hard drives, CD drives, etc.) Try to restart. If you get it to boot, you can add in one item at a time, and realize that when it won't start that is probably the culprit.
Next, If you have a second PC that has known good RAM of the same type, I would swap that out as well. Then try to boot with just video, Mainboard and RAM. If you see any blinking lights/sounds/etc. then report that on here as well. There are beep codes and on Dell's there are light error codes.
I you do happen to have a spare CPU, you could swap that out as well if you can, but I would not bet that is the problem as they are pretty durable for the most part.
If none of these comes up with a booting PC, it could be your replacement mainboard is bad.

Mar 19, 2011 | Dell Dimension 5100 (D51L1) PC Desktop

4 Answers

I have a Dimension 4700 that was working until recently.Now the computer won't boot at all. There is no power, the fans aren't whirring, no beeps and no video on the monitor. The only signs of power are a...


1a Research your blinking amber lights and the ABCD's. If the specifics don't explain a LACK of power (because even a shorted USB device can sap your juice resulting in a no video condition for example) try these:

Steps to get any PC running again:
1. Remove all addon cards and HD's CD's, so all you have is video, keyboard, and mouse.
Try it - if you see any video, add one thing back at a time starting with your boot and other drives. When it dies again, there's your problem...
2. Reseat the RAM and CPU
Try it, if it works you fixed it until oxygen does its thing again in a year or two...
3. Test power supply voltages with a meter, just test a hard drive connector, red and yellow are positive and the 2 blacks are grounds you should have both 12 volts and 5 volts, (plus a couple lower voltages for the CPU and RAM on the MB, disregard for now) if 5 and 12 are there, test that they have good amperage (over 1 amp will *usually* mean you have full power)
If it still doesn't work, it's either a power supply problem with the lower voltages, or a motherboard problem, retry steps 1 and 2 a couple times, then...
4. beg borrow or (eeek! buy) a power supply...

80 or 90 percent of the time, you won't get to step 3, let alone 4, all that's left is the motherboard, etc. good luck

Aug 09, 2010 | Dell Dimension 4700 PC Desktop

1 Answer

Solid amber light with fan running, so i assume the power good signal is being received, no diagnostic lights and no POST. I've disconnected and substituted all the drives with known good parts, bought new...


Please let me know if the numlock light responds by pushing the numlock key on the keyboard. If you are using a videocard, please disconnect it and connect the video cable to the integrated video. Make sure you disconnect all the expansion cards. Please let me know if this doesn't work.

May 20, 2010 | Dell Dimension C521 PC Desktop

1 Answer

System unit led is yellow and start good condiotion but no signal


The light on the LCD screen stays yellow?

I would start with puling out the ram chips and see if it works,

If you get some beeps and video works with ram chips out, then its a bad ram chip.

If thats not it.. unplug all cards cd/dvd rom and harddrive to test motherboard and CPU chip. see if you can get video to work with everthing but cpu and power suppy unpuged

Apr 28, 2010 | Dell Optiplex 755 Desktop Desktop Computer...

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

Fans run at full speed under normal task.


THE PROBLEM IS THAT THE CPU AND MB AND PSU IS NOT COOLING OFF ENOUGH AND CAUSING THE FAN TO RUN ON HIGH ALL THE TIME, THE PSU MAY NOT HAVE ENOUGH WATTS POWER TO RUN THE CONFIGURATION TO KEEP THE SYSTEM AND HARDWARE TO COOL.

I READ IT IN ONE OF MY PC MAGAZINE, ANOTHER PERSON UPRADED SYSTEM, ADDED SOME OTHER STUFF BUT THE MB AND POWER SUPPLY UNIT DIDNT HAVE ENOUGH WATTS TO SUPPORT BASIC REQUIREMENTS OPERATING THE SYSTEM BASIC NEEDS.
FIND SOFTWARE THAT KEEPS EYE ON HEAT ISSUES, MB, VIDEO CARD, RAM, PS, CPU, CPU COOLERS, NIC CARDS, SOUND CARDS,
ETC.
EACH PART REQUIRES SO MUCH POWER
AND HERE HOW IT BRAKE DOWN FOR EACH COMPONET

MB 20-35+ WATTS
CD ROM 20-25 WATTS
DVD 30-45 WATTS
DISK DRIVE 5 WATTS
HD 5-15 WATTS
STANDARD VIDEO VARD 5-15 WATTS
MEMORY 5 WATTS PER MB

NEW SYSTEMS WITH THE FOLLOWING STUFF IN IT FLOPPY DRIVE,CD-ROM, MB, 16MB RAM, REQUIRES A MIN. 150 WATTS OF POWER.

BUT I KNOW YOU MAY HAVE TOP OF THE LINE VIDEO CARD WITH GGR4 WITH 512MB
MEMORY, 2-8 GIG OF RAM, 23 INCH LCD MONITOR, 2 500GB HD, BLUETOOTH AND WIRELESS NETORK, AND WIFI CAPABILITIES,
NEW DUAL CORE CPU TOP LINE MOTHERBOARD, COOLED VIDEO CARD,RAM COOLER ALSO AND THIS SYSTEM POWER WATTAGE REQUIREMENTS MAYBE SOME WHERE AROUND 400-600 WATT, AND MOST OF THAT IS FOR THE SYSTEM RAM AND THE VIDEO RAM YOU ARE RUNNING
REMEMBER 5 WATTS PER 1 MEGABYTE OF
RAM
IT WILL ADD UP FAST BOY'S AND GAL'S

ROD

PS I HOPE I DIDNT BORE ANYONE,
IT MAY SAVE YOUR SYSTEM FROM BURNING UP.

Mar 14, 2009 | HP Pavilion A730N (PJ510AA) PC Desktop

1 Answer

No display


Try swaping your memory with a known good stick of ram.
Are you sure your monitor is good? Video cables?
Try changing (if pci) slots when installing video card.
Other than these 3 things the only pretty sure thing is; sorry, mother board or cpu.

Jul 01, 2008 | E-Machines eMachines Desktop PC

1 Answer

No output to monitor,graphics cards work,new psu, new ram, all lights come on and fans turn. the mobo is a winfast nf4sk8aa graphics - nvidia 6600gt x2 cpu - amd 4000+ ram - corsair 1gb 3200 value select...


unplug power
re-seat video card
plug power - turn on all
windows comes up - else try another video card.
control panel under video uninstall then reinstall video driver
repair video programs or install video program

Mar 13, 2008 | PC Desktops

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