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laptop just beeps when I turn it on


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#1 Rozesky

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Posted 24 January 2015 - 08:45 AM

My dell win 7 laptop just beeps when I turn it on. I tried taking out the battery..that did not work.

 

Then I replace the ram with good ram and that did not work.

 

It beeps over and over there is not pattern and it doesnt stop beeping until I turn it off

 

Does anyone know how to fix this?



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#2 zingo156

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Posted 24 January 2015 - 10:07 AM

Are there any flashing lights? Any pattern with those flashing lights? Here are some things to try for general hardware diagnostics for laptops and desktops, parts differ slightly but the method is the same:

 

Make sure you have the computer unplugged from power and the battery removed while removing or moving any hardware...

 

Try 1 stick of ram in 1 slot at a time (remove all other ram sticks). Move it to the next slot until you have tried that stick in all slots by itself. If you still have no post, try a different stick of ram in each slot by itself. If you have issues with the stick in 1 particular slot (a no post for example) the slot may be bad. It is also possible you have a bad stick of ram instead of the slot being bad, in this case the ram stick should cause the same problem all slots.

 

You may have a memory controller issue in which case if you have 4 slots, 2 may not work. With intel it should be 2 slots next to each other channel 1 might be slot 0,1 and channel 2 might be 2,3. Trying with 1 stick at a time in all 4 slots is the best way to test everything.

 

If you never get a stable system with just 1 stick of ram in 1 slot (trying all sticks by themselves) try removing all non-essential hardware to get into bios:

 

Disconnect pci cards, pci-e cards - except a video card unless you have onboard in which case use the onboard video and pull the video card, hard drives, dvd drives, disconnect all usb headers as well. You should only have the power supply, main board, 1 stick of ram in 1 slot, the cpu and cpu cooler connected. You can also plug in a monitor and keyboard. Now try to power on the machine. If at this point you have no post screen or video etc, unplug the computer and pull the stick of ram, power back on and listen for a post fault beep code, you will need to hook up a motherboard speaker to hear any post fault code, if this is a laptop it should be built in.

 

If you get no response next: remove all of the components from the computer case and connect only non-essential hardware outside of the case, place the motherboard on a non-conductive surface, a wooden table will do fine. Then try to power on again, you can short the power button pins on the motherboard, don't worry this is exactly what the power button does. Just touch a metal item to both power button pins to try to power the mainboard when outside of the computer case.

 

While you have the computer apart, look for blown or bulging capacitors on the mainboard and video cards etc Examples please report any caps you suspect may be bad, you can take a picture and post here if you are unsure.


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