Dead Power Supply? 2

[Bahnzai]

Hi all.

I am upgrading my old pc with some new hardware, this is what I using:

Asus a7n8x-deluxe mobo
AMD Athlon XP 2100+
PNY PC2100 Memory
NVidia TI 4200
300W Power Supply

I install the mobo, processor, RAM, and video. I flip the switch, and nothing happens. Fans do not spin, nada, but power is going through the board (the mobo has an LED indicating power is going through).

I put my old 185 watt power supply in my computer to test things out and without even pressing the "on" button, my fans starting spining, but there is no video, beep code, etc.

Would it be safe to conclude that my 300 watt power supply is dead?

Thanks

Bahnzai

 

[gargouille]

Guess you don't have a voltmeter to test it?

With the suspicious PS, do the fans spin for even a split-second?

Wouldn't write it off without testing the outputs with a voltmeter. You could have other things stopping the process.

 

[thebigguy128]

Regardless if it is dead or not, you'll want a bigger power supply. You don't mention what peripherals you have...(how many hard drives?...cd-rw?? zip?? dvd???) 300w is not enough power. You can check at AMD for their list of recommended power supplies...I would recommend at least 450w...500w would be better.

Dana

 

[Mulga]

"I put my old 185 watt power supply in my computer to test things out and without even pressing the "on" button, my fans starting spining, but there is no video, beep code, etc."

This may be a clue, it should not happen. The 185W PSU is of course not enough for your setup but it should not start without pressing the power button. I suggest you check your power switch connection, ensure it is on the right pins, or maybe a faulty switch. Could also be a faulty motherboard
Help us to help you, please post back and tell us if this helped.

All things are possible except skiing through a revolving door.

 

[gargouille]

Good call, Mulga, I wondered about that and should have said so!

 

[Bahnzai]

I was starting to suspect the motherboard, but I hoping that it isn't.

I did double-check to make sure the power switch is on the right pins. Plus, I am confident that the switch itself is good, because it works correctly when I re-install my old mobo, power supply, and peripherals.

I'll try to get a replacement mobo and I let everyone know how things went.

thebigguy128 suggested that my 300 watts would be inadequate for this system. My only other periperhals will be a CDRW and DVD. If the mobo is the problem will I have enough power to even run the system.

I really appreciate everyone's comments and suggestions.

 

[pentode]

I think 300W should be adequate. The power supply gets its marching orders from the motherboard. If it is not running at all, I would suspect a bad connection in the power connector perhaps. Take a look at all the pins and see if everything looks OK and that the wires are connected to the pins on the connector.

Not sure how much memory you have, but if you have multiple sticks, take it all out except one stick. Bad or incompatible memory will cause the motherboard to hang up on boot.

Try removing the graphics card to see if the response changes. I don't think the system will boot without the graphics card, but you may be able to get the power supply to come to life.

A bad motherboard is a possibility, but check out all the other possibilities first.

 

[Bahnzai]

Looks like to mobo was dead. I received a replacement and everything is going great!

Thanks again for all your help.