(English) Hardware Maintenance Manual - ThinkPad E550, E555, E550c


Page 9
... each machine was designed and built, required safety items were installed to : http://www.lenovo.com/serviceparts-lookup. Check the power cord for worn, frayed, or pinched cables. 9. Check for damage (loose, broken, or sharp edges). 2. Check inside the unit for 0.1 ohm or less between objects. Protect against ESD... part, the work mat, and the person handling the part are present, you can occur when there is to attachment of non-ThinkPad features or options not covered by equalizing the charge so that the power-supply cover fasteners (screws or rivets) have not been removed...