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Changed mb/cpu/ram, beeps are ok, leds ok, but screen in standby, help

Last response: in Motherboards
a b V Motherboard
September 7, 2010 7:39:59 AM

My old (2005) configuration was, Enermax Silent 485W, a Gigabyte MB, Radeon X850 XT and Athlon 3200+. I bought an Asus P7P55D LE with an i5 760. Well, after upgrade i hear a beep after poweon, then i see they keyboard lights correctly blinking, then another beep and stop (which i think indicates that POST has finished), but no video at all. If i press ctrl-alt-canc system reboots correctly.

Ideas? I tried to:
- Swap memory, leave one bank and so on, nothing
- Removed power from the X850XT and motherboard starts beeping with the "no videocard" code
- Unplugged ALL disks, only motherboard and videocard are powered

Video card was working on the other mainboard.

Could it be the PSU?
a b Ĉ ASUS
a c 78 V Motherboard
September 7, 2010 12:34:46 PM

It could be the PSU. Did you remember to connect the 8-pin power lead to the CPU_PWR?
a b V Motherboard
September 7, 2010 12:42:07 PM

Jep, i have connected them (just 4 pin, the other 4 are covered).

Anyway, waiting a bit after boot mother board beeps, basically i have:
- 1 long beep, keyboard poweron, 5-10 seconds of nothing, then 3 short beeps followed by 4 short beeps