IBM THINKCENTER 8189 - Manual (Page 97)

No-beep symptoms
Symptom/Error FRU/Action
No beep during POST but computer works
correctly.
System Board
No beep during POST.
1. See “Undetermined problems” on page
109.
2. System Board
3. Memory Module
4. Any Adapter or Device
5. Riser Card
6. Power Cord
7. Power Supply
Chapter 7. Symptom-to-FRU Index 91