Michael Welch wrote (on 12 Sep 2005): And I suck, because it's taken me 'til now to get me, the service manual, and the e-mail reader together. This means that the "extensive memory test" failed in the base 64KB of RAM. The 0004 would indicate bit 2, which on the 9-inch 150 is the IC at U44 on the Mezzanine Memory PCA, and 000c would indicate bits 2 and 3, and bit 3 is U45. The service manual suggests replacing the board or those ICs on the board. Briefly, self-test codes on the 9-inch 150s go like this: 00xx - 0axx: extensive memory test failures the second digit (0-a) indicates the 64KB page; 0-9 are page numbers, but a is also page 0 the third and fourth digits indicate which bits failed 10xx - 19xx: traveling 1s RAM test failures the second digit (0-a) indicates the 64KB page; 0-9 are page numbers, but a is also page 0 the third and fourth digits indicate which bits failed 20xx - 29xx: memory refresh test failures the second digit (0-a) indicates the 64KB page; 0-9 are page numbers, but a is also page 0 the third and fourth digits indicate which bits failed 30xx - 39xx: marching 1s RAM test failures the second digit (0-a) indicates the 64KB page; 0-9 are page numbers, but a is also page 0 the third and fourth digits indicate which bits failed 3fxx: integrity test (RAM) failures repair indication is to replace boards containing DRAM until problem stops occuring 4xxx: RAM ID test failed bit 0 should be 1 bits 1-10 indicate which 64KB page failed 5355: CMOS RAM failed CRC 57xx: CMOS RAM failed non-destructive test 6xxx: system ROMs failed either CRC or position test 8xxx: interrupt controller test failed 91xx: keyboard and touchscreen test failed 93xx: real time clock test failed 980x: microprocessor test failed 9cxx: HP-IB test failed axxx: datacomm port 1 test failed bxxx: datacomm port 2 test failed dxxx: alpha (terminal) SRAM test failed exxx: graphice (terminal) DRAM test failed ffxx: alpha video controller test failed I'm thinking most of these test codes have similar meanings for the 12-inch 150s too, but don't have the manual in front of me to check; and of course the IC part locations differ between the two. -Frank McConnell