LAPTOP WONT BOOT

Hi Team,

Recently My dell latitude e6330 wont boot up.. after trying to turn it on, diagnostic led is stable and the other two leds are blinking which means memory modules are not detected as said in the guidelines for dell laptops. Ive tried replacing both ram, tried to clean it up, replaced it with ram from working laptops with the same build its still not working, could it be that the motherboard itself is broken? is it possible to fix the said ram slot? if not what are the possible reasons that causes this damage. 

Please reply asap or if any information available dell team.

Cheers!