Memory Test Error - MiTAC 8050QMA Service Manual

8.5 Memory Test Error-1

Extend DDRAM is failure or system hangs up.
Memory Test Error
1. Check if on board SDRAM chips are no cold
solder.
2. Check the extend SDRAM module is installed
properly. ( J713,J714)
3. Confirm the SDRAM socket (J713,J714) is
ok,no band pins.
Test
OK?
No
If your system host bus clock running at
266MHZ then make sure that SO-DIMM
module meet require of PC 266.
Test
OK?
No
80 50QMA
80 50QMA
Yes
Correct it.
Yes
Replace the faulty
DDRAM module.
N/B Maintenance
N/B Maintenance
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.
Board-level
Troubleshooting
Parts:
U710
U7
J713
J714
R691
R692
R606
R242
Replace
C285
Motherboard
C604
Signals:
+1.8V SMBDATA
+3VS SMBCLK
S[A..B]_MA[0..13]
NB_CLK _DDR[0,1,3,4]
CKE#[0..3]
NB_CLK _DDR[0,1,3,4]#
CS#[0..3]
ODT[0..3]
S[A..B]_BS#[0..2]
S[A..B]_CAS#
S[A..B]_RAS#
S[A..B]_WE#
S[A..B]_DQS#[0..7]
S[A..B]_DQS[0..7]
S[A..B]_DM[0..7]
S[A..B]_DQ[0..63]
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