power on problem ??? help please anyone

**Pingo1969** · 04-03-2004, 01:29 PM

hey...

i have installed my system and i works great when i can get it to turn om ..... problem is that only every 5-10 time i power the computer up, that i actually boot up....i dont know why ???

some times it power instantly, and some times the screen just reads "NO SIGNAL" and nothing happens but my computer is starting that i can se and hear....does anyone know of this problem ???

is it the controller on the motherboard that is the problem ? i have changes the harddrive to a brand new 80 GB and it works great, so that isent the problem....

Best regards
Kenneth

**Ricky327** · 04-03-2004, 01:49 PM

Hmm...can be anything really. Most likely its the motherboard.

Go for minimal cofigurations, remove the hdd, cd, extra ram or card.

If you can boot up ok with bare PC then you know the problem is on one of the part you taken out. Put them back one by one until the problem reoccur.

Hope that helps anyway.

**Nav_Attack** · 04-03-2004, 01:52 PM

what Ricky told you is good advice.. but if you can really hear your system booting, what does that mean exactly? you can hear the harddrive/cdrom drive start spinning? that may not mean that the computer is starting, just that your drives have power.

so like Ricky said i'd try booting with just the mobo and video card.. it should fail on bootup with a no ram message, but you should see that. then add ram. try again. then add hdd. try again, etc.. it could also potentially be your video card.

i know its not very helpful at this point, cause it really could be anything.

**Ricky327** · 04-03-2004, 01:55 PM

Yeah...the sound doesnt mean much but atleast the power is getting through...or some of the power

**Pingo1969** · 04-03-2004, 02:00 PM

Originally Posted by Nav_Attack

what Ricky told you is good advice.. but if you can really hear your system booting, what does that mean exactly? you can hear the harddrive/cdrom drive start spinning? that may not mean that the computer is starting, just that your drives have power.

so like Ricky said i'd try booting with just the mobo and video card.. it should fail on bootup with a no ram message, but you should see that. then add ram. try again. then add hdd. try again, etc.. it could also potentially be your video card.

i know its not very helpful at this point, cause it really could be anything.

it all sounds right but when i boot up in 220 V there dosent seems too be any problems it`s only when i boot up in tha car ????

Best regards
Kenneth

**Rob Withey** · 04-03-2004, 02:48 PM

That suggests that your power supply is at fault. What is your power solution?

**Pingo1969** · 04-03-2004, 03:48 PM

Originally Posted by Rob Withey

That suggests that your power supply is at fault. What is your power solution?

it is a ITPS Low dropout and power sequencer module, and a 12 power suply

Kenneth

**Rob Withey** · 04-03-2004, 04:15 PM

Originally Posted by Pingo1969

it is a ITPS Low dropout and power sequencer module, and a 12 power suply

Kenneth

Are you starting the computer with the engine off? ITPS drops the voltage by about 1.3V and the 12v power supplies (if it's a pw series unit) generally won't boost it back up for the 12v line (they have no regulation on the 12v line). Check the 12v power coming out of the power supply for a low voltage.

**Pingo1969** · 04-03-2004, 04:23 PM

i usually first start the car, before i start the computer by switch on the dashboard, ...

does any of u know if it is a problem if the harddrive and the computer is tiltet and not possitioned vertical og horizontal ???? could it be the problem ? i have boltet the computer to the backside of the rearseat,??

Kenneth

**Pingo1969** · 04-03-2004, 04:26 PM

Originally Posted by Rob Withey

Are you starting the computer with the engine off? ITPS drops the voltage by about 1.3V and the 12v power supplies (if it's a pw series unit) generally won't boost it back up for the 12v line (they have no regulation on the 12v line). Check the 12v power coming out of the power supply for a low voltage.

when the car is running and the computer i measured the power supply on the amp, ( i have 2 amps installed, connected to the same powerwire as the computer..) it measurer 13.9 volts when the car is running, and 12 volt when the computer is on and the car engine stopped...

Kenneth