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CPU Clock Speed is lowered when battery is detached - ThinkPad

Symptom

System CPU Clock speed is lowered while when battery is detached from the system.

Affected Configurations

The following ThinkPad systems maybe affected by this symptom:

   Edge 13, Edge E30, Edge E120, Edge E320
   L42, L520
   R60, R60e, R61, R61e
   R400, R500
   T60, T60p, T61, T61p
   T400, T500
   T410, T410i, T410s, T410si, T510, T510i
   T420, T420i, T420s, T420si, T520, T520i
   W500, W510, W520, W700, W700ds, W701, W701ds
   X1
   X61, X61s, X61 Tablet
   X121e
   X200, X200s, X200 Tablet
   X201, X201i, X201s, X201 Tablet
   X220, X220i, X220 Tablet, X300, X301

Solution

Condition may occur when system battery is removed and powered with a 65 watt AC adapter that the CPU clock is lowered to prevent accidental shutdown. If maximum frequency operation is preferred in such situations, a 90W AC adapter should be used.

If you are unable to find what you are looking for, please do try the following options: 1. Lenovo Assisted Search 2. Product usage and general troubleshooting tips 3. Lenovo Support Forum 4. Technical Support Call Centre

Country Availability Available Worldwide Document ID : HT002982 Legacy Document ID : MIGR-71222 Last Updated : Copyright © Lenovo 2013, all rights reserved