Dell Inspiron N4020 Setup Guide - Page 52
System Messages - hard drive replacement
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Using Support Tools System Messages If your computer has an issue or error, it may display a System Message that will help you identify the cause and action needed to resolve the issue. NOTE: If the message that is displayed is not listed in the following examples, see the documentation for either the operating system or the program that was running when the message appeared. Alternatively you could see the Dell Technology Guide on your hard drive or at support.dell.com/manuals or see "Contacting Dell" on page 72 for assistance. CMOS checksum error - Possible system board failure or RTC battery low. Replace the battery (see the Service Manual at support.dell.com/manuals) or contact Dell (see "Contacting Dell" on page 72). CPU fan failure - CPU fan has failed. Replace the CPU fan (see the Service Manual at support.dell.com/manuals). Hard-disk drive failure - Possible hard drive failure during POST. Contact Dell (see "Contacting Dell" on page 72). Hard-disk drive read failure - Possible hard drive failure during HDD boot test. Contact Dell (see "Contacting Dell" on page 72). 50