Hi! So I just bought a new 1 gb crucial ram for my HP Pavilion Media Center TV m7750n PC (http://h10010.www1.hp.com/wwpc/ca/en/ho/WF06b/12132708-12133156-12133158-12133158-12133158-79481422-...) and I can't seem to fit the RAM into the slot on the motherboard (I have to force it in, and then the pc wont boot, and gives off a beeping sound). The RAM that I brought was CT12864AA53E (1GB 240-PIN DIMM 128Mx64 DDR2PC2-4200 UNBUFFERED) and I'm sure that it matches the 2*1 GB RAM that already came with my computer (I verified the memory specifications with HP's website and other websites) Thanks!
This is the correct memory for your system. Please make sure you are lining up the notch in the gold teeth with the ridge inside the slots. It can take a good 20 to 30 pounds of pressure to get memory to seat correctly. You want to press hard enough for the end clips to close completely on their own.
If this doesn't work for you, please try the new memory in the system alone in the first slot.