Lenovo System x3750 M4 Installation And Service Manual page 204

Table 35. Symptoms and user actions for observable problems (continued)
• If an action step is preceded by (Trained service technician only), that step must be performed only by
a Trained service technician.
Symptom
Power supply - squealing,
scratching, or grinding noise.
Power supply - Jet or
fast-moving air noise.
Power supply - Clicking or
rattling noise.
Fans - Squealing, scratching,
or grinding noise.
Fans - Jet or fast moving air
noise.
Fans - Clicking, or rattling
noise.
Visible physical damage;
Broken, damaged, or
malfunctioning door, bezel,
cover, or chassis part.
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Lenovo System x3750 M4 Installation and Service Guide
Action
1. If the server is running redundant power, pull and replace each power supply,
one at a time, to determine which power supply is causing the noise.
2. If a single power supply is identified as causing the problem, complete the
following steps:
a. Make sure that the power supply causing the noise does not have an
obstruction (cable, cable label, etc).
b. Replace the power supply.
3. If the noise can not be associated with a single power supply, it might be
coming from the cooling fans.
Check the IMM event log for events associated with thermals, cooling, and fans.
1. If the server is running redundant power, pull and replace each power supply,
one at a time, to determine which power supply is causing the noise.
2. If a single power supply is identified as causing the problem, complete the
following steps:
a. Make sure that the power supply causing the noise does not have an
obstruction (cable, cable label, etc).
b. Replace the power supply.
3. If the noise can not be associated with a single power supply, it may be coming
from the cooling fans.
1. This server has redundant hot-swap cooling. Remove and replace each fan
assembly, one at a time, to determine which assembly is causing the noise.
2. If a single fan assembly is identified as causing the problem, complete the
following steps:
a. Make sure that the fan assembly causing the noise does not have an
obstruction (cable, cable label, etc) touching the fan blades during operation.
b. Replace the fan assembly.
3. If the noise can not be associated with a single fan assembly, it might be
coming from the cooling fans in a power supply.
Check the IMM event log for events associated with thermals, cooling, and fans.
1. This server has redundant hot-swap cooling. Remove and replace each fan
assembly, one at a time, to determine which assembly is causing the noise.
a. Make sure that the fan assembly causing the noise does not have an
obstruction (cable, cable label, etc) touching the fan blades during operation.
b. Replace the fan assembly.
2. If the noise can not be associated with a single fan assembly, it might be
coming from the cooling fans in a power supply.
Contact Lenovo Support.