Question about Dell Dimension 4600 PC Desktop

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A and b lights on back are yellow and computer wont stay on. computer beeps three times then reboots never rebooting completely. continually

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If your computer is under warranty, contact Dell as they can troubleshoot this with you.

If you have your monitor plugged in via DVI (cable with white connectors on ends using a digital connection), try switching to an RGB cable (with the blue connectors on ends also called an analog signal). Remember to switch your source to RGB on the monitor(s) as well.

If that isn't the problem, then before getting to the Windows loading screen, press F8 a few times and choose "Safe Mode" and see if that allows you to boot up into Windows. From there try to figure out what recent system configuration changes could have take place that could have caused this malfunction. Perform a virus and malware scan as well.

All the best.

Posted on Jul 14, 2009

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Posted on Jan 02, 2017

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Cant turn my computer on and there is a yellow blinking light


How many blinks? Count and notice the patterns of the blinks (3 long blinks or 1 long blink followed by two short blinks).

Remove the Power Cord, Open the Case and remove one of thememory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x onit with an ink pen. If it fails to boot then move the chip to the nextmemory slot and try rebooting. If it fails take the chip out and set itaside, then put the other chip in and try booting it in both slots. If itboots, just to verify that the chip set aside is bad, mark an x on it and putit into the open memory chip slot and try booting.If all the above fails, you problem could be your Video Card or a motherboard issue.

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Long beeps at startup and won't boot up


What is the pattern of the long beeps? one long beep or two long beeps, three long beeps?

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.

Remove the Power Cord, Open the Case and remove one of the memory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x on it with an ink pen. If it fails to boot then move the chip to the next memory slot and try rebooting. If it fails take the chip out and set it aside, then put the other chip in and try booting it in both slots. If it boots, just to verify that the chip set aside is bad, mark an x on it and put it into the open memory chip slot and try booting.

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Mite try taking the disc out when rebooting

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Power light on and beeping and no picture acer aspire t180


If your computer beeps when you turn it on you have a problem with your power supply, system board, graphics/video card or keyboard.
Reboot your system with out the keyboard if it no longer beeps your problem is a couple of stuck keys on the keyboard.
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Screen went blank, have yellow indicator on monitor, try to reboot, getting three beeps, nothing more.


One beep during startup is "good", but THREE is not good.

Three beeps means a hardware fault -- probably that the video-adapter on your computer has failed.

Connect the monitor to another desktop/laptop, to confirm that it still works.

Turn the computer off, and disconnect the power-cord.
Remove all the RAM, and then re-insert just one stick.
Reconnect the power, and try to boot.
If you still get THREE beeps, turn it off.
Disconnect the power-cord, and reinsert the remaining RAM sticks.

If you still have the problem, then it's time to replace the video-card on your computer. Take the computer to a computer-store, so that they can sell you a video-card that will be compatible with your motherboard.
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Fujitsu lifebook n5010 notebook won't reboot i let the battery run out while working. next day, turned on three loud beeps, then three loud beeps then fan runs but no display on the screen. power off,...


Okay, sounds bad.

However, take out the battery from the laptop and remove mains lead. Go and make tea! Then, drink it. Once you have complete this task.

Plug in the AC lead ONLY into the laptop and then try to power it on.

You should see lights on the Hard Disk LED or hear a beep. If you see them but nothing on the screen at all when booting then the capacitor pack has probably gone on the screen. This is not an expensive part, but you do need to know what you are doing to replace it. Think it time to give it to the workshop or ask IT bod to look at it for you.

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Start Up


O.K. Try this:

Turn the power off at the wall, Pull the GF card and flash the BIOS (refer to manual to locate JP1 move the jumper so that it covers the central pin and the previously exposed pin hold for three seconds and return to origional position). If you have altered any VGA jumpers put them back in their origional positions. Reboot using the unboard graphics card.

If it reboots with a nice clear beep from the onboard speaker and gives U a dsiplay we are on a winner if not we have a more involved problem.

Please please note: NEVER HAVE POWER CONECTED TO YOU SYSTEM WHILST YOU ARE ALTERING ANYTHING PHYSICAL INSIDE THE TOWER JUST DONT AND TAKE STATIC PRECAUTIONS.

O.K.: Lets just say you rebooted with display, reboot again but this time breaking into the BIOS (usualy either DEL, F2 or F10 being struck repeditaviley on boot untill the BIOS comes up). Search thru the the BIOS options untill U find one that alows u to disable the onboard VGA and often u will find one that alows u to enable the Advanced Graphics Interface depending on the manufacurer this may be a default setting that if u disable one it automaticaly enables the other or it could be called something different but u know what I mean.

O.K.: Time to check the manual if there are any onboard jumpers or such to disable the onboard VGA switch them (fairly rare for a number of years but possible). Reinstal the GF gently but firmly have stumped myself many a time and seen others do it whare a card or component feels sound but is not properly seated.

Moment of truth reboot using the GF. I this works.

If on boot u either get a string of continuous beeps or no beeps at all u have a more serious problem and a more lengthy solution. Primarily unplug everything from the MB, reinstall the CPU and the minamum amount of RAM, flash the BIOS and reboot. No beep, no display no boot back to the manufaturer/ supplier for a replacemant under warranty.

O.K. u got a beep u got a display - now it is time to start installing each component individualy starting with the minimum amount of RAM and ending with the rest of the RAM untill u can identify which component is stopping your system from starting. Identify the component get back to us and it could be a realy easy fix. You never know I once had a machine that I "fixed" worked perfectly on my bench but failled when the client got it home - finaly got the shits, striped it completely and found a loose screw under the MB that mooved every time he transported it after a fair bit of swearing I just had to laugh.

Good luck

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I found some solutions other posted that didn't come up the first time I looked. I did a reboot and I'm good to go!

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