... .If the screen without any display itself, please check the computer power + 3.3 V output.Second-ranking shows "no diagnosis ... circuit piece." ,0x07, "processor test 2, verify the CPU registers work." ,0x08, "make CMOS timer for initial preparation, dazed update timer ... vector used 8259 watch." ,The firm, "0x17 video input/output work." ,0x18 video memory, "test." ,0x19, "test first channel interrupt ...