Gateway MX7515 motherboard install/trouble/problems, help?

Alright here we go. I have a Gateway MX7515 laptop here that had a bad motherboard. I got another motherboard and whenever I put the bare components in to test to see if the unit will even POST, nothing happens. Well something happens and this is what it does:

It will turn on per the status light indicating the motherboard is receiving power. The light will stay on for a while then shut off and then turn back on and stay on.

When I am doing this, I have the following connected:
Motherboard
Processor
Memory
Power switch
Sometimes I have the hard drive
Sometimes if the HDD is connected, I can hear the HDD powering on for a brief moment and then it will shut down (this is when the status light also turns off).

I’ve already returned one motherboard for doing the same exact thing. I’m guessing I’m doing something wrong but I’ve never had this many problems with a laptop motherboard swap. I mean this thing is driving me insane. It really shouldn’t be this hard. It’s really just swap parts, put it back together, turn it on and all should be well – in this case, it is not.

This is where you come in. I’m hoping someone has experience with the MX series notebook and swapping out the motherboard and or components. It’s quite possible that something is missing like the keyboard and mouse have to be connected in order for the unit to boot properly and or I am missing something entirely. This again is where you come in. I hope you guys can lead me in the right direction. I know my stuff like the back of my hand and I’ve researched Google through and through and could not find anything. I hope that someone here has messed with this particular series (MX7515) and can help me! If so, please write to me!

 

this may be off topic but i was given a gateway mx6027 but was not given the system disk i have downloaded all the drivers but i cannot get the audio card (realtek ac'97)to work i have phoned gateway they couldn't help me its says its installed but cannot start can anybuddy help PLEASE

 

i wound suggest you put laptop back to toghter laptop shound not realy be test in parts

make sure the fan is connect i notice on listed you did,nt say you did


send us picture might be able see what wrong but change mainboard is laptop if you not carefull is pain to do it cound be some simply that not post or cound be lot other things ?

are you try run this on lcd panel or exterenel mointor to test is?

does make any sounds when you try to post does fan spin up stop?

what was wrong with it before you change mainboard did not post at all ?

 

I have the exact same problem though I never rebuilt the laptop. I simply replaced the hard drive with another i recieved from gateway. THe sound is stubbron to work. Everything else is perfect.

 

I have a MX7525 but I haven't tried switching the mobo yet. Still waiting for my warranty (2 years left) to expire than I can start on the good modifications.

Can you boot into the BIOS?

 

I wonder how to disassemble the motherboard of the laptop, my module is MX serious. My DC jack is bad, and it has been repaired 3 times, each time they charge me money, so I want to fix it by myself. but can not move the motherboard out of the case.

Thanks a lot!