when you say memory, do you mean the flash memory chips or the sram/ram chips?
And, other than opening up a unit and guessing which ones are which (well i can do an educated guess based upon part numbers, etc), do you know of any sites that might have some level of documentation on this?

For example, I have a 1490T that is exhibiting the signs in the first post - absolutely will not take a flash and doesnt boot other than pre-boot mode.
I have another "dead" 265w that only boots to white screen. (It used to work, but I played with it a bit too much until i caused it to white screen of death).
I'm wondering if I can use the parts from the 265w to fix the 1490T