I doubt it is the CPU or two Motherboards with the exact same fault.
Do you have access to a Multimeter to test voltage with the fan connected?
Did the replacement board have a fan attached or did you install your old fan?

 

Thanks Panther063.

Yes, I do have a multimeter. A digital one, but how do I test the voltage with the fan connected? How do I access the pins with the fan plug covering them? Also, there are 3 pins on the board with the fan plug having the red and black wires on the outside with the yellow wire in the middle. I test red and black, correct?

Secondly, the replacement board did have a fan and it is identical to the one on the original board. Both worked off the board with a dedicated and separate power source putting out 6 volts. The fans are rated at 5 volts.

 

You could try to insert the pointy ends through the wires covering or remove the plug and test the terminals on the board.

 

Okay Panther063, I removed the plug and tested the terminals on both boards, with power. I tested the outside terminals (where the black and red wires from the plug would contact). I tested both of them powered up with the battery and with the power cord attached, and the results were identical:

Original board - 0.05 to 0.07 volts

Replacement board - 0.05 to 0.07 volts

They fluctuated between 0.05 and 0.07.

This appears to be way too low, as the fan requires 5 volts. Have any ideas where to go from here?

 

Okay Panther063, I removed the plug and tested the terminals on both boards, with power. I tested the outside terminals (where the black and red wires from the plug would contact). I tested both of them powered up with the battery and with the power cord attached, and the results were identical:

Original board - 0.05 to 0.07 volts

Replacement board - 0.05 to 0.07 volts

They fluctuated between 0.05 and 0.07.

This appears to be way too low, as the fan requires 5 volts. Have any ideas where to go from here?

>>>>Looking at your thread, you didn't state whether this Multimeter test was with the fan connected to the plug or not. If you unplug the 2 fans you have (they both tested ok on separate power sources), try testing the fan plug (connector) terminals with the Multimeter again. If you aren't getting 5 volts coming out, then yes, it's possible you have 2 failed Motherboards with the fault of not producing 5Vdc to the fan connector. When you purchased the replacement Motherboard, did you buy it used or new? I ALWAYS buy new Motherboards; as used ones produce poor results. :nonono::nono: It's more than likely that a Motherboard for a laptop that's only $25 will have 1 or more failures. The fact that is has the SAME EXACT failure as your first one is not at all unlikely. It's more likely it's a circuit design flaw with that particular model and series. Dell has a few laptop models where this sort of thing occurs; the new Dell All-in-One 2305 TouchScreen desktop springs to mind. Laptops have this same sort of problem. If you fail to get the 5Vdc output voltage as I detail above, it's time to purchase a new Motherboard from a reliable source. If on eBay, make sure you buy ONLY from a top-rated seller with a Feedback Rating of 99% or higher. Another good source I use is Server Supply in NY. Every single Mobo I have ever bought from them is 100% every time. Sounds like you know a bit about computers. If you ever worked for a computer manufacturer this would sound very familiar. I worked for hundreds of computer companies as a Manufacturing Engineer, so I know.
Hope this helps! :thumb:

Keep us posted.<<<<

BIGBEARJEDI

 

Update the Bios to A10 and it will work again fine. Good Luck