I have an LPC4350 based board that came in for repair. I have discovered that you cannot read/write internal AHB SRAM address 0x20004000 to 0x20007FFF. The processor issues a hard fault when code tries to access this memory area. Using the IAR IDE memory window, you only see "--" in this memory range. Other memory ranges seem to work fine. Any ideas on what may be wrong? Just a failed part???