IBM Power AC922 8335-GTW Handbook page 25

Table 3. GPU problems and service actions for the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or
8335-GTX
Problem
System unable to find GPU
Service action
1. Verify that the GPU is properly seated.
2. Verify that the drivers for the GPU are installed.
3. Verify that the most recent firmware is installed
on the system. Otherwise, install the most
recent firmware if it is not already installed.
4. Restart the system.
5. If the GPU is still missing, replace the following
items, one at a time, until the problem is
resolved:
Note: Go to "8335-GTC, 8335-GTG, 8335-GTH,
8335-GTW, or 8335-GTX locations" on page
25 to identify the physical location and the
removal and replacement procedure.
a. GPU
b. System processor modules
c. System backplane
Beginning troubleshooting and problem analysis 11