An unbranded troubleshooting guide for electric shavers is available at FixItClub.com and addresses some of the more common issues that occur with shavers. ManualsOnline.com has a large database of shaver manuals useful for repairing problems in specific shavers.
Fix It Club identifies the heads, power unit and screen of the shaver as sources of many common problems. If the shaver operates sluggishly or does not remove hair efficiently, the heads may need lubrication or cleaning. Alternately, the power unit may need recharging or the battery replaced. If the shaver pinches or irritates the skin, the screen may be damaged or corroded and requires replacement.