When i boot my computer it boots upto where it says the crappy 128MB of RAM i have then freezes for a couple of minutes, then reads only two of my three HDDs and doesn't read tha i have a CD-ROM drive. it happened for a couple weeks then got worse cause it would boot regularly most of the time then like once in every 15 times it would boot correctly. then i got some dust off and that helped for about 5 days... then i pulled out a random jumper on my newest HDD and that helped for a couple of weeks... now it is doing it again. this is just recently... nothing has been changed in about a year or more inside the computer

don't know what to do please help!!

donations of computers/parts are welcome

You should check and insert all the Master/Slave (sorry for me being politically incorrect ) jumpers on undetected devices properly.
Replug all IDE cables properly.
Set up IDE devices/controllers properly in BIOS.