For eld replaceable units (FRUs), authorized service providers can try the following steps. For more information,
see Removal and replacement procedures for authorized service provider parts on page 65.
● Reseating the fan cable can x POST error 90B (no fan detected) issue (see POST error messages and user
actions on page 171).
● Reseating the power cable can x a no-boot issue.
● Reseating the daughterboards can resolve their functional issues. Some models may have items such as a
power button board, VGA board, and others.
● Reseating graphics cables and panel connectors can x distorted or ickering video.
● Replacing thermal pads may resolve thermal power-down issue.
ENWW General troubleshooting steps 117
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