On some pc's that would mean it does not detect any RAM present.
here is the Maintenance Manual for your series :
http://download.lenovo.com/ibmdl/pub/pc/pccbbs/thinkcentre_pdf/41t3751.pdf
[ Beep Codes begin on page 75 ]
Tallon41
SOURCE: Lenovo 3000 K100 Beeping
There are two types of beep, the continuous one with the same interval ,it indicates memory problem, but if the beep with two short beep the graphics card has a problem.That works?
SOURCE: How do I reformat my lenovo desktop 3000 J series?
easiest way is to secure an bootable OS(Operating System) disc insert then restart and go to the bios setup then set 1st priority my friend to cd\dvd and save. Restart, you will be prompt to press any key which responds to the disc that you have insertedthen you'll be brought to the setup and then there an option where you can format and install the OS.
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