Lenovo Wanquan R680 G7 Memory Quick Location
1. First, let's understand the memory distribution and installation. Memory is installed on memory boards; the motherboard has corresponding slots for these memory boards. Each memory board has 8 slots, namely:
DIMM_1B , DIMM_1D, DIMM_1A, DIMM_1C
DIMM_2B , DIMM_2D, DIMM_2A, DIMM_2C
Memory modules 1B, 2B, 1D, and 2D belong to one bus; memory modules 1A, 2A, 1C, and 2C belong to another bus.
2. The memory installation order (must be installed in pairs) is: 1B & 1D → 1A & 1C → 2B & 2D → 2A & 2C.
3. If a single memory module on a bus reports an error, all memory modules on that bus will report errors.
For example, if there is an error on 1C, then memory modules on 1A, 1C, 2A, and 2C will all report errors, and the alarm light on the memory board will turn on.
The error can also be seen in the BIOS.
4. Quick Troubleshooting for Faulty Memory
If a memory error occurs, it typically involves a single memory module. To locate the faulty memory:
a. Enter the BIOS to check the memory status. You will see the status shown in the figure above: memory modules on the same bus are marked as Failed. Record the memory board number and the location of the reported error.
b. Remove the four recorded memory modules and label them clearly to avoid confusion.
c. Install two suspected memory modules onto different buses on the memory board (e.g., 1B and 1A). Do not install the other two suspected modules; instead, install the remaining four known-good memory modules into all available slots except 2A and 2C. This way, you will have two suspected modules and four good modules on the same memory board, with exactly one suspected module per bus. Consequently, if any bus reports an error, you can identify which specific module is faulty (either 1B or 1A). If no error appears in the BIOS, the suspected modules are functioning correctly. Test the other two modules using the same method to confirm the faulty memory! If there are two memory boards, you can locate the faulty memory in one step by replacing the memory modules at positions 1B and 1A on the second memory board with the other two modules.