Start-up troubleshooting BLIND and DEAF

Y2135

Reputable
Jun 20, 2014
4
0
4,510
Ok, this is a bit bizarre thing.

I built pc and for some time I'll have no access to any monitor.

And of course it won't start up.

Bad thing is case and motherboard have no system speaker, so I can't diagnose through BIOS signals.

I describe you the symptoms, and you respond what it can be (or send me off until monitor is available - I'll understand):

1. Everything is connected and the case is closed.
2. Long ago BIOS was set to use ONBOARD video adapter. But I took out battery and placed it back few hour ago.
3. When I push the POW button, POW LED lights up, HDD LED blinks few times, all fans spin.
4. Connected Keyboard remains "silent" - numlock, capslock, scroll lock LEDs don't light up or blink.
5. After ~1 minute pc restarts itself and will go on with restarting itself again and again in the same time period.
6. I switch off pc by holding down POW button for several seconds. Sometimes it starts itself back, but second attempt to switch it off ALWAYS success.
7. I took aff cpu cooler right after switching off and touched CPU - its body temperature.

what's going on?

p.s.: i have PCI videocard inserted, but start without it gave the same result.

p.p.s: okkkkkk here are the specs:

Gigabyte GA-G31M-ES2C
Pentium 4 2.8 GHz
Geforce 8500GT
Transcend DDR2 1.5 GB
Seagate 7200rpm 160 GB
Powerman 300W
 

itsVance

Honorable
Jun 17, 2014
493
1
11,165
Hard to say, but your PSU could be causing the power cycling.

Could also be incorrect memory settings in the BIOS.

About what you said about removing the heatsink from the CPU. Did you make sure to clean the CPU and Heatsink properly and reapply thermal paste before putting it back on?
 

harry_r_s

Honorable
Mar 28, 2013
303
0
10,960
.
As 'itsVance' said - hard to say
Did you update your bios before last shutdown?
Did you switch off the power to shut it down ?
Try removing all peripherals and start the pc.
Try to get into your bios and set to defaults.
Did you heat up your pc too much while the last working state of your pc.
Try this too-
Reset the CMOS memory according to your motherboard guide..
.
I think if your boot device had problem, bios had warned you..