Hello, i got problem with my hp-elite 7300mt, after i push power button, computer hangs almost instantly (1-3sec) at HP logo(7.12ver)
i tried following steps:
-reset bios settings(removed battery for 15 minutes)also usung Clear CMOS jumper
-change DDR memory slot \ try to boot with different(100% working memory) \ boot without memory(computer starting beep without it)
-tried to boot without HDD\card reader\dvd-rom
-tried to boot without video card
-tried to boot without mouse and keyboard(got second 7300 and it can do it)
-tried to change power supply unit (it was 20pin but still hang on the same place)
-tried to hold\push ESC\f2\f8\del\f10
(picture in attachments) also i notices that if i plug my mouse to the lowest USB ports(marked red)it will blink once when i trying to bood (keyboard wont blink at all) but if i plug mouse to USB ports above(marked green)or to the front USB it wont blink
Thanks.