06-13-2015 03:03 PM
Solved! Go to Solution.
06-13-2015 03:28 PM
Welcome to the Lenovo Community !
If you have tried clearing the CMOS by removing the main battery and pressing the power button for 60 seconds or longer and that didn't do any good then I would next try booting the system with the memory, hard drive, optical drive and wireless card removed. Now see if the machine makes an attempt to boot up. If it does then install a memory module and try booting again. Continue on installing a hardware item and booting. When the no boot scenario returns then suspect the last hardware item installed as being faulty.
The reason I mentioned pressing the power button for 60 seconds or longer when trying to clear the CMOS is that your model has the CMOS battery soldered directly to the motherboard. In order to truly clear the CMOS you would need to remove both the main battery and the CMOS battery which you can not do. By pressing the power button for 60 seconds or longer you're hoping that the coin cell battery can not keep up with the power drain and will thus clear the CMOS.
If clearing the CMOS and removing the hardware items still does not improve the boot up situation then suspect the motherboard has failed. Your model's Hardware Maintenance Manual will explain how to remove the motherboard. The link below is for your model's Hardware Maintenance Manual. When working inside your system please follow all precautions and recommendations that are noted in the manual.
06-13-2015 03:47 PM
06-13-2015 03:55 PM
Yes. you are correct. Just remove the main battery and unplug the computer from the charger / adapter and then press the power button for 60 seconds or longer. If your finger will stand the pressure, I'd go over minute just to be sure.
06-14-2015 09:44 AM
06-14-2015 09:57 AM - edited 06-14-2015 09:59 AM
Mostly likely your motherboard is the problem. Replacing it is something that you can do if you are comfortable working inside your laptop. Probably the cheapest source for a replacement would be eBay although they are not cheap, around $250 for a used one and $475 new (U.S.). Your model's Hardware Maintenance Manual will explain how to disassemble the laptop for the replacement. Here is a link to that manual......
Prior to replacing the motherboard you might want to have a local computer repair shop look at it and see what opinon they have. If anything they should be able to briefly unsolder the CMOS battery and clear the CMOS for you.
06-14-2015 11:23 AM
Hopefully a total reset of the CMOS will resolve the problem.
Best of luck!