>From time to time I must repair an equipment that has its own BIOS, CPU an= d SDRAM This SDRAM has 256MB together and consists of 4 SDRAM modules(IC). Sometimes equipment does not work.Then there are several possibilities for= that. Faulty CPU or BIOS or SDRAM. Is there a method how I can find out that SDRAM is faulty? If so which modu= le of those 4=20 SDRAM modules might be faulty? Each SDRAM module has 66-pin Plastic TSOP(II) and is soldered on PCB. Thank you for help --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .