Monday, June 30, 2014

Request to Send (RTS)


Many of us don't know enough about the control signals....speaking for one who does not!

Thursday, June 12, 2014

Wednesday, June 11, 2014

"Fan" Failure

HP PC reported a fan failure and would not boot.   Trouble shooting showed failure was power out on the motherboard fan connector.   First picture shows slice to pickup power from one of the SATA power lines.  Second picture shows connector sending tach signal back to "failed" motherboard fan connector.  Power out from this connector was bad but it still recognizes the good tach signal and now proceeds to boot.