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Re: no beep no visual but fan is running
Remove all other units attached to the motherboard and try to boot in the BIOS - if you can then the hard disk has died, replace it. If you can't replace the processor and try again - if you can't then the motherboard has died, replace it.
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Have you tried removing the new video card? Try that first. The fact that your keyboard doesn't light most likely means that either your power supply is being pulled down by the video card or is now gone. Was your power supply rated high enough wattage for your computer with the new video card? If the video card was higher-end then it's possible that it killed the supply. It could also be the motherboard that's gone. Static discharge when putting the video card in, or a bad video card can destroy a motherboard.
your monitor has no problem, its your cpu. Try to hook your monitor to your laptop,and change the display setting to your LCD monitor.
If LCD has displaying no signal mean signal coming form the Video card of your CPU
try to visualize if you hearing some beeps into from CPU, some motherboard has beep codes
if there's an error or failure to your CPU, 1 beep means its good system test.
if you don't hear any beeps, try to check first your Video Card
if you have Spare try to replace it, try to reset all the connectors even Memory card to its slot.
reset means pull the connectors and place it back again,
also check the power supply of cpu if still functioning good.but you can test it by multi volt meter.
if nothing happens check your motherboard most common failure is bloating capacitor, and overheating chipset.
thanks....................hope this helps...................
Here are the following steps you can try to fix this issue, ive experienced it myself using a dell PC and it works on my end.
You have what is called a No Post No Video Situation.
1: The Modem can cause a No Post No Video. Pull it and see what happens. If it still does not boot. Strip the System down with nothing on the Board but Power Supply Processor and Fans. This
Includes All Memory, All Cards, All IDE Cables. Hook just the Power up
and See if you get Memory Error Codes ( Beep Codes ). If you Do ( And
you Should ) then Reseat the Memory ONLY. If you dont more than Likely
it is the Power Supply or Motherboard. If Reseating the Memory
back in Memory Bank 0 causes a No Post. Pull the Memory and put the
Memory in Bank 1. If it Post then Bank 0 is bad on the Motherboard. If
it Dont, You Need Memory. If you have more than 1 stick then try with
one or the other and make sure one of them is not bad. If it is Rambus
Memory you will need to add both sticks, because Rambus is Required for
Pair. If in Bank 0 the System Posts, add the Video Card and
connect the Power and Monitor. You should get Post and Video. If you do
not, Video Card is bad. From there add the Hard Drive IDE and
Boot the System. If it does not boot then try the IDE Cable in the
CDROM Controller and see what happens. If it Boots then the Controller
on the Motherboard is bad. If it Causes a No Post No Video, Hard Drive
is Bad. From there Add One IDE Back at a time and make sure it is
none of those drives or Controllers. If you find that one of the Drives
is causing a No Post No Video, Try a Known Good Drive. If it Posts and
Boots. The Drive is Bad. If it Dont, The Controller on the Motherboard
is bad. After that Add one card back at a time. Find out which
one is causing the Issue. Sometimes Reseating everything works fine. If
none of these work then You May have Either a Bad Power Supply or a Bad
Processor. Also dont forget that you may have had a Surge or Storm and
May have Caused a the Motherboard to get damaged. Dell has a Good Artical on Steps to do for this at http://support.dell.com/us/en/kb/document.asp?DN=TI1014149
A Blinking Amber orYellow power button means that the power supply is receiving power from thesource but is unable to properly distribute it to the components. This can becaused by a defective power supply or a defective motherboard. Just to makesure that nothing else is causing the problem, remove any PCI cards like modem,video card, sound card, etc... Remove the memory modules and disconnect cablesto CD/DVD drives. Look at the USB ports to see if any are damaged.
Is it possible to try the monitor on another computer? If so try that. I've worked with motherboards that don't give a power up beep code (strange, I know), so after the checking the monitor, I would try removing and re-seating the video card, and memory, one at a time and see what happens. Is the cpu fan running? Check these things out. Is there onboard, integrated video in addition to the graphics card? If so, try using the integrated video port. If the cpu fan is running, and the power led and hard drive leds are working, then it's a safe bet it's not your power supply. It would have to be the video card, in my opinion .
Disconnect all cables, remove all cards and memory. Reinstall one stick of ram, power cord, video cable and keyboard. If that works reinstall other components one at a time.
I found a hp a1600n at the dump. Brought it home, had same problem, tried this. A memory stick was loose. Resetting it fixed it. I am typing on it now. You might try the memory first. A chip could have gone bad.Are you using the board video or a video card?
leave only the motherboard and power supply connected. power on. listen for beeps....then put in the processor, check for beeps, memory, then video card,, then hard drive. test power supply voltage, or try with a known working power supply. if you still cant find the problem its most likely the motherboard
Could be 3 things Memory or CPU or Powersupply. are you getting any beeps if so how many, how long. try taking all the memory out and powering up see if it beeps if so try to put one stick of memory in at a time and see if it will boot. if you get no beeps with memory out check powersupply some PS's have a red switch on back for current input. switch back and fourth about 20 times uning a pen and set it to the right current for you location. put ram back in see if it will boot if not its trial and error of the PS and the CPU replacement and it still could be the RAM giving false readings. yea i know sounds like a ball of fun.