hey there is no jumper on my laptop lenovo b490

Suhas MJ

Estimable
Feb 7, 2016
3
0
4,510
0
i changed somethin in bios settings now after restarting no display i tried taking cmos battery and connecting to other monitors and ram and after taking ram it sounds beep but after i fixed still no display
 

zer0c00l587

Estimable
Jan 14, 2016
258
0
5,210
69
That is the problem with laptops, after a bios update my fan sound like a chicken with a soar throat, really disturbing crap, removing the battery with charger plugged in and holding power button down for 20 seconds did squat for cmos resetting. However after a month irritation i didnt it use for a couple a months and presto it works like new now. This mean a complete drain of power is needed sometimes reset cmos. It may not need months but some serious downtime is needed for complete power drain.
 
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