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zellchuck
Copper

XPS 400 Won't Boot

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After I push the button to turn on the computer, the 3 and 4 light stays on as does the power light and then the boot sequence stops.  Per instructions, I removed one memory card at a time and try to reboot testing each one, but the results are the same.  Any idea what to do next?

Thanks.

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Davet50
Diamond

Re: XPS 400 Won't Boot

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Lets try some simple things first (Put at least one memory stick in or both makes no differnece at this time.

Unplug the computer. unplug all external connections, once all external devices are disconnected press and hold the power button for 10~20 secs.

plug in only the keyboard,mouse and monitor. plug in the computer and try to boot.  Note the diagnostic lights as well as the color and condition of the power button light.

 Home Built Sandy Bridge P8P67 i7 2600k @ 4.5 GHz 8gigs GSkill Ripjaws. Corsair 800D Case and AX1200 Ps X-Fi Titanium Fatal1ty pro PCIe Sound Card
Dell Studio XPS 1645  Window 10 Pro

Forum member since 2003

zellchuck
Copper

Re: XPS 400 Won't Boot

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First, thanks.  Did what you suggested.  As soon as I pushed the power button, the 3 and 4 light came on; green and solid.  Power light also green and solid.  The hardrive light came on also; green; then went off.  No sounds from the computer.  Next? :-)

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shesagordie
Diamond

Re: XPS 400 Won't Boot

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zellchuck

Have you tried installing the each module in different slots?

Remove all the memory modules, then install only one module in slot 1, then see if the system boots and if the computer starts normally, reinstall an additional module.

Does not boot, move the module to slot 2 and again see if the system boots, no boot, try the module in slot 3, no boot, try installing in slot 4.

Still does not boot, then remove the first module and using the second one, repeat the sequence described above.

Still no boot, try installing any remaining modules, one at a time, using the above procedure.

Continue until you have identified a faulty module [or slot] or reinstalled all modules without error.

Bev.

 


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zellchuck
Copper

Re: XPS 400 Won't Boot

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Thanks. I did all combinations and unfortunately, the same result.  Any other thoughts?

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Davet50
Diamond

Re: XPS 400 Won't Boot

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for a final test remove all the ram, remove all the cards, unplug the power connector to the harddrives. Press the power button and note indications.No significant change then the mb is bad. Your power supply is ok as you are getting a green button light.

I do believe though that the motherboard has given up the ghost.

 Home Built Sandy Bridge P8P67 i7 2600k @ 4.5 GHz 8gigs GSkill Ripjaws. Corsair 800D Case and AX1200 Ps X-Fi Titanium Fatal1ty pro PCIe Sound Card
Dell Studio XPS 1645  Window 10 Pro

Forum member since 2003

shesagordie
Diamond

Re: XPS 400 Won't Boot

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zellchuck

You could buy a new compatible memory module and try that, but I believe that Davet50 is right, the motherboard has failed and needs to be replaced.

Bev.

 


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zellchuck
Copper

Re: XPS 400 Won't Boot

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Thank you all for your support. I tried another module and no change.  New motherboard on its way. Thanks again.

Re: XPS 400 Won't Boot

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seems to be a common problem.  Do a search on - lights 3 4  -   "Page 2 of 66,424"

when you ordered a new motherboard did you get a dell or other,  I am not sure if it is an atx or btx board

http://support.dell.com/support/edocs/systems/dimxps/en/sm/techov.htm#1084976

 

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shesagordie
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Re: XPS 400 Won't Boot

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seems to be a common problem.  Do a search on - lights 3 4  -   "Page 2 of 66,424"

when you ordered a new motherboard did you get a dell or other,  I am not sure if it is an atx or btx board

http://support.dell.com/support/edocs/systems/dimxps/en/sm/techov.htm#1084976

 

The XPS 400 supports only a Dell BTX motherboard. 

Bev.

 


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I am not employed by Dell

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