Lenovo ThinkPad 370 Hardware Maintenance Manual - Page 348

Symptom/Error Abnormal screen Uneven color on the screen Spot on the screen The computer has an intermittent problem when you use it on the overhead projector. The remote control does not work. FRU/Action 1. Check that the white film on the LCD cover is clean. Gently wipe the film with a dry, soft cloth, such as a lens cleaner. 2. LCD Cover 3. Diagnose the LCD assembly by following "LCD Related Symptoms" on page 336. Note: The customer may be responsible for repair costs if the LCD cover was damaged due to misuse, excessive force, scratch, or liquid spilled by the customer. Problem such as high environmental temperature might be the cause. Use the stand supplied with the computer. 1. Check that two AAA alkaline batteries are installed in the remote control. 2. Check that two AAA alkaline batteries in the remote control are at their normal energy (voltage) level. 3. Enable the IR port of the computer with the ThinkPad Features program. (Disable the serial port at this time.) 4. Refer to the trouble shooting section in the Help menu of the Mind Path Presentation F/X program. Set up this program following the guide. 5. If the preceding items are correct, the radiation from the light of the overhead projector might be interfering the IR port of the computer. Disable the rear IR port of the computer, and use the remote control with the front IR port. 6. Use the remote control with another computer, which IR port works normally. If the remote control does not work, the remote control is not working properly. If there is still a problem, refer to "Infrared Related Symptoms" on page 342. 338 IBM Mobile Systems HMM