Fontrom Test; Eeprom Test; Dram Test - Dell 3110cn Service Manual

4.1.4 FontROM Test

Calculates the Font ROM checksum and compares it with the value stored in the FontROM.
Executes this test when the 016-310 error occurred.
Test result: NG (Go to FIP.) OK (Turn off/on the main power.)
This test calculates the checksum of the each FontROM, and compares it with the valid checksum
value stored in the corresponding chip beforehand. When the checksum is identical to the stored
value, this test judges the chip is normal.
Normal
CHECK OK

4.1.5 EEPROM Test

Performs write/read/verify on the diag. area of the EEPROM.
Executes this test when the 016-327 and 016-323 errors occurred.
Test result: NG (Go to each FIP.) OK (Turn off/on the main power.)
The test performs read/write/verify of the test patterns (0xff,0xaa, 0x55 and 0x00) on one byte at
every 0x400 from the first address of EEPROM.
Normal
CHECK OK

4.1.6 DRAM Test

Tests OPEN/SHORT with the address line of the DRAM.
Performs write/read/verify on the entire DRAM.
Executes this test when the 016-315, 016-316, 016-318 and 016-332 errors occurred.
Test result: NG (Go to each FIP.) OK (Turn off/on the main power.)
When the optional DRAM SIMM is checked and found, it checks the optional memory area.
First, the test performs read/write/verify of the increment data for the whole tested area by the
word. Then, it performs read/write/verify of the test patterns (0xffffffff, 0xaaaaaaaa, 0x55555555,
0x00000000) for the whole tested area by the word.
Normal
CHECK OK
Version 1 2006.02.03
Error
FontROM ERROR
S=xxxx V=yyyy
(xxxx:calculated value yyyy:ROM stored value)
Error
EEPROM ID* ERROR (ID*:1,2)
Error
DRAM slot* ERROR (*ÅF0,1)
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Chapter 2 Operation of Diag.