Hp pavilion a6437c has no power to the monitor,keyboard or mouse. Cannot hear any sound like a bio's beeps. Keyboard lites flash for a split second then go out. Heatsink cpu fan spins up fast then slows down. Hdd spins ok. DVD/RW drive working ok. Media Card drive ok. Power button comes on & stays lit ok. PSU lite on back comes on & stays on nomally. Removed memory chips one by one. Removed all hardware one by one. Tried another new PSU. Removed both password & cmos jumpers & swith them back. Tried the sleep mode keyboard function F1 to try to get it out of sleepmode. Simply has no power to the preferals I mentioned. Found NO sweeled capcitors on MOBO & no burning smells. Removed the CPU & applied new paste. Suspecting maybe the MOBO is bad. Thanks! David
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