no power to mouse , keyboard or monitor

[DreamState]

hallo' everybody

a few days ago my mouse , keyboard , an monitor wasn't getting any power from my tower . at first i thought it was my power supply an i replace it but nothing happen.. so it wasn't that and i returned it . tha cpu an my other fan was spinning as usually . i can hear tha hard drive working , my cd / dvd drive open an close .

my keyboard an mouse lite up as usual when i first turn the computer on an nothing else and my monitor it just goes to power saving mode . weird things is that my mouse would work when the keyboard isn't plug in , but not tha opposite way around .

i some how got my monitor to work but not the mouse or keyboard , but it would just freeze on the " hp invent screen " . on the screen it show the push " esc" to reboot  , F1- (i forgot sorry T.T) F10 to system . i have a few more day of school left before i can go check on it at my parent's house.. so i can't really do anything till i go down on saturday .

my system specs is -

HP Pavilion a450n
Pentium 4 / 3.0 GHz:
HyperThreading Technology
800 MHz front side bus
mPGA478
Windows XP SP3
Chipset
848P
1Gig of ram
160 GB Ultra DMA 7200 rpm Hard Drive
GeForceFX 5200 AGP2 8X card: graphic card
ASUS P4SD-LA PES revision 0.01 - motherboard

if i miss anything here ,here the website to my motherboard an computer specs . thank you for taking your time to look at this

(motherboard ) http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00063272&lc=en&dlc=en&cc=us&product=392522#c00063272_doc

(Computer specs ) http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00058235&tmp_track_link=ot_faqs/top_issues/en_us/c00058235/loc:2&lc=en&dlc=en&cc=us&product=392522

[quaxo]

Your post is kind of confusing. So the computer just won't boot at all, right? Sounds like you have more of a problem than your keyboard and mouse. What kind of mouse and keyboard are these? PS/2 or USB? The specs indicate that that computer comes with a PS/2 keyboard and mouse, but just need to verify this is what you're still using.

Again, like I said, if it isn't booting past the HP Invent screen or giving you some kind of error message, the keyboard and mouse are most likely not the issue.