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8355 N/B MAINTENANCE
8355 N/B MAINTENANCE
137
Replace
Motherboard
If your system host bus clock running at
800MHZ then make sure that DIMM module
meet require of PC-2100/2700/3200.
Replace the faulty
DDR module.
1.If your system installed with expansion
DIMM module then check them for proper
installation.
2.Make sure that your DIMM sockets are OK.
3.Then try another known good DIMM
modules.
Memory Test Error
One of the following components or signals on the motherboard
may be defective ,Use an oscilloscope to check the signals or
replace the parts one at A time and test after each replacement.
Yes
No
Test
OK?
Yes
No
Re-soldering
Parts:
U503
U20
U9
J6
J7
R538
R88
R86
R536
R535
R537
R284
Signals:
Check
U503,U20
J6,J7
For any cold
solder?
Test
Ok?
Replace the faulty
DDR RAM module.
Yes
No
DDR_CLK[0:1]
DDR_CLK[4:7]
DDR_CS[0:3]#
CPU_CKEA
CPU_CKEB
CPU_MD[0:63]
CPU_DQM[0:7]
CPU_DQS[0:7]
MEMADD_A[0:13]
DDR_CASA#
DDR_BAA[0:1]
DDR_RASA#
CPUCLK+
CPUCLK-
SMBCLK_DDR
SMBDATA_DDR
Board-level
Troubleshooting
Symptom:
Either on board or extend DDR RAM is failure or system hangs up.
RP503
RP505
RP507
RP509
RP511
RP514
RP518
RP520
RP522
RP525
RP526
RP530
8.6 Memory Test Error