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3020
March 21st, 2017 07:00
Dell OptiPlex 755 does not boot.
Hi,
I have Dell Optiplex 755, which does not boot into System Setup or BIOS. I was able to use it yesterday and it was working fine until it shuts down itself with 4 long beeps. I unplugged the power supply and boot the machine but nothing happens. The 4 long beeps were gone, it does not boot into system setup or BIOS. I have decided to buy a new hard disk as I suspected it was the problem. I managed to install the new 500GB disk but still, it does nothing. I also tried to remove the cable attached to hard disk and reinstall the disk but to no avail.
Please help.
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ejn63
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87.5K Posts
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March 21st, 2017 10:00
Four beeps is a RAM failure - unplug the system, hold the power button and remove and reinstall the memory modules. Try again - if you get the same no-boot, try one module at a time in each socket until you isolate the bad module (replace that) or bad socket (in which case, replace the mainboard).
MelTar
2 Posts
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March 22nd, 2017 00:00
That did the trick. I found the faulty RAM memory