cmos problem

kelticknight · Feb 16, 2007, 03:20 PM

having cmos prob,when it boots,says the cmos sumcheck bad
so cleared the cmos with jumpers and rebooted,same again
then cleared the cmos again and removed the battery and same thing again
removed all the hardware except the graphic card,memory,hard drive, and still the same
another thing is message on post= usb device over current detected
same message about usb even when no usb being used

swimtech · Feb 17, 2007, 03:47 PM

Ouch, you've gone through the basics...

You could have a problem on the mainboard with USB voltage or signal routing (possible short - causing overcurrent message...)

I'd get the case open, have the mainboard manual handy for the pinout designations on the USB header on the mainboard as reference. Here's an example...

FRONTX - How to Install Internal Port to Motherboard Header (Pinouts)

With a meter and all USB devices disconnected (including mouse and keyboard...) and the system on, carefully measure the 5v line to ground using the pins on the header - be very careful not to slip with the meter probes and short pins together! Check if the 5volts is there with all USB devices disconnected with your minimal configuration setup. If the 5volts DC is missing, check the 5v on the PSU power connector on the mainboard power connector. If missing on the USB header and present on the PSU mainboard connector, then the mainboard likely is the problem.

kelticknight · Feb 17, 2007, 04:10 PM

hey
swimtech
figured it out with your help
was a bad usb connection from one of the cables comming from case which allow me to connect a usb device to it,so replace the cable with one i made up and the it allow me to post to reformatt h-drive and flash the mobo ,all running good now
cheers for your help

Matth · Feb 18, 2007, 10:22 AM

Lucky! - bad USB header cables can fry something, and the insane variety of pinouts used doesn't help.

swimtech · Feb 18, 2007, 02:09 PM

Whew! Glad it's "not the mama"!

CDsDontBurn · Feb 19, 2007, 08:40 PM

Quote:

Originally Posted by Matth

Lucky! - bad USB header cables can fry something, and the insane variety of pinouts used doesn't help.

for sure! one time i killed a flash drive because i had set up the USB header wires from the case to the MoBo backwards.

As soon as i put the drive in the case's front panel USB port, and i saw smoke coming out of it, i was like "sh!t"

kelticknight · Feb 20, 2007, 01:14 PM

first time ever happened to me,did same with other mobo with same case before and didnt have a problem
you learn

Feb 16, 2007, 03:20 PM	#1
kelticknight DriverHeaven Knight Join Date: Mar 2003 Location: EIRE{great for black stuff ,bulmers cider and Munster rubgy Posts: 1,098 Rep Power: 0	cmos problem having cmos prob,when it boots,says the cmos sumcheck bad so cleared the cmos with jumpers and rebooted,same again then cleared the cmos again and removed the battery and same thing again removed all the hardware except the graphic card,memory,hard drive, and still the same another thing is message on post= usb device over current detected same message about usb even when no usb being used __________________

Feb 17, 2007, 03:47 PM	#2
swimtech At Your Service... Join Date: May 2002 Location: North Carolina Posts: 3,989 Rep Power: 100 System Specs	Ouch, you've gone through the basics... You could have a problem on the mainboard with USB voltage or signal routing (possible short - causing overcurrent message...) I'd get the case open, have the mainboard manual handy for the pinout designations on the USB header on the mainboard as reference. Here's an example... FRONTX - How to Install Internal Port to Motherboard Header (Pinouts) With a meter and all USB devices disconnected (including mouse and keyboard...) and the system on, carefully measure the 5v line to ground using the pins on the header - be very careful not to slip with the meter probes and short pins together! Check if the 5volts is there with all USB devices disconnected with your minimal configuration setup. If the 5volts DC is missing, check the 5v on the PSU power connector on the mainboard power connector. If missing on the USB header and present on the PSU mainboard connector, then the mainboard likely is the problem. __________________ It's not so much getting your way that matters or not - what matters is how you go about getting it.

Feb 17, 2007, 04:10 PM	#3
kelticknight DriverHeaven Knight Join Date: Mar 2003 Location: EIRE{great for black stuff ,bulmers cider and Munster rubgy Posts: 1,098 Rep Power: 0	hey swimtech figured it out with your help was a bad usb connection from one of the cables comming from case which allow me to connect a usb device to it,so replace the cable with one i made up and the it allow me to post to reformatt h-drive and flash the mobo ,all running good now cheers for your help __________________

Feb 18, 2007, 10:22 AM	#4
Matth Flash Banner Hater Join Date: Jun 2002 Location: UK Posts: 3,198 Rep Power: 56 System Specs	Lucky! - bad USB header cables can fry something, and the insane variety of pinouts used doesn't help. __________________ Mary had a little lamb, Her father shot it dead Now Mary takes her lamb to school, Between two crusts of bread

Feb 18, 2007, 02:09 PM	#5
swimtech At Your Service... Join Date: May 2002 Location: North Carolina Posts: 3,989 Rep Power: 100 System Specs	Whew! Glad it's "not the mama"! __________________ It's not so much getting your way that matters or not - what matters is how you go about getting it.

Feb 20, 2007, 01:14 PM	#7
kelticknight DriverHeaven Knight Join Date: Mar 2003 Location: EIRE{great for black stuff ,bulmers cider and Munster rubgy Posts: 1,098 Rep Power: 0	first time ever happened to me,did same with other mobo with same case before and didnt have a problem you learn __________________