
Rev. I
Troubleshooting
8-7
MR Series Technical Reference Manual
Time Setting is Not Possible or Time Setting Disappears
❏
Follow the procedures below.
1. Confirm whether replacing the lithium battery on the main circuit board solves the
problem.
2. Confirm whether replacing the main circuit board solves the problem.
“CMOS Checksum Error” occurs frequently during the POST
❏
When the lithium battery is depleted, this error occurs. If the battery is not changed, CMOS
RAM may be cleared or the RTC is cleared every time the power of IM-800 is turned off.
Replace the battery with the commercially sold lithium battery type CR2032.
Memory Faults
Memory Count Displayed by POST Differs from Actual Memory Size
❏
Follow the procedures below.
1. Replace the DIMM(s).
2. Confirm whether replacing the DIMM(s) solves the problem.
• Note that EPSON guarantees only DIMM products that EPSON recommends.
3. Confirm whether replacing main circuit board solves the problem.
Memory Error
❏
Follow the procedures below.
1. Check DIMM installation.
2. Replace the DIMM(s).
3. Confirm whether replacing the DIMM(s) solves the problem.
• Note that EPSON guarantees only DIMM products that EPSON recommends.
4. Check CPU installation.
5. Confirm whether replacing the CPU solves the problem.
6. Confirm whether replacing the main circuit board solves the problem.
Summary of Contents for DM-M820
Page 1: ...Technical Reference Manual MR Series English 403308709 Rev I EPSON ...
Page 2: ......
Page 20: ...xviii Rev I ...
Page 42: ...2 8 Setup for the IM 800 and the DM M820 Rev I ...
Page 50: ...3 8 Hardware Specifications Rev I ...
Page 178: ...5 38 BIOS Functions Rev I ...
Page 216: ...8 26 Troubleshooting Rev I ...
Page 323: ......
Page 324: ...SEIKO EPSON CORPORATION EPSON ...