Problem is Power Supply, or Electrolytic Capacitors on motherboard.
A Power Supply with a failing voltage power rail, will show these symptoms
http://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=371#spec
http://www.newegg.com/Product/Product.aspx?Item=N82E16813138184
Around the Processor (CPU) you will see there are Solid Polymer Capacitors. Small 'aluminum can's with a blue mark on top. (One side on top)
However there are also Radial Aluminum Electrolytic Capacitors, on that board.
See if any are bad;
http://capacitorlab.com/visible-failures/index.htm
http://www.youtube.com/watch?v=Lut7MX5Dd_A
http://www.youtube.com/watch?v=KN6_-8fYHo0
Starts at 0:04
For additional questions please post in a Comment.
Regards,
joecoolvette
SOURCE: Where is the Bios reset
Based on the layout below, the jumper to reset your BIOS is to the left of the SATA connectors. It should be markes JCMOS1.
Follow these procedures to clear the CMOS data :
1. Remove AC power line.
2. Set the jumper to "Pin 2-3".
3. Wait for at least five seconds.
4. Set the jumper to "Pin 1-2".
5. Power on the AC.
SOURCE: Biostar motherboard resumes power after shutdown
There is an option called Wake On Lan. Check your BIOS and disable that option. The name may differ, instead of WAN it may say PCI. Take a look.
The second part is the NIC. Look for wake up options. I'm logged in Windows right now and it has that options setting. So does iOS. I imagine so does Ubuntu. I'll check next time I reboot into Ubuntu.
GL.
id you recently upgrade your PC, change its components, or test a setting in the BIOS that now stops it from power up all the way? Here's how to reset your BIOS.
First of all, if you have, read the manual to the motherboard and look for BIOS or CMOS Reset.
Generally, the easiest and least fiddly method is to remove the power cord from the computer, open it and look for a button battery (usually bigger than the ones in a watch) remove it for for five or ten minutes. Theoretically this should work.
If no manual is handy and removing the battery did not work try the following:
Power down your PC.
#Locate a rocker-style switch at the back of your PC (if applicable), and switch it from the on position (I) to the off position (O). If there is no switch disconnect the power cord from power supply.
#Find the 3-pin jumper near the power supply on the motherboard, typically labeled "clear cmos" or "reset bios".
#Remove the jumper from the default position (typically connecting the 1st and 2nd pins).
#Replace the jumper to connect the 2nd and 3rd pins.
#Push the power button on the front of your PC once.
#Wait a minute.
#Return the jumper to its default position, connecting the 1st and 2nd pins.
#Move the rocker-style switch at the back of your PC (if applicable), to the on (I) position.
#Power on your PC with its front power button.
If it doesn't work go to alternate options.
#open Command Prompt , click Start Menu > Run > type CMD (enter).
#type debug (enter).
#then type this bellow code
o 70 10
o 71 20
type quit.
exit
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