Apple 24-inch mid 2007 manual Glass Panel, Contamination inside the glass panel

applications, make sure all software updates have been applied to the computer. Make sure all software updates have been applied to the computer. Refer to KBase article 303903, Intel-based iMac: Installing available updates , and to Apple Downloads for all available updates for the iMac (Mid 2007) model of computers. If the updates don’t solve the problem go on to step 2.

2.Follow the steps in this section under “No Power”.”

Glass Panel

Contamination inside the glass panel

1.Clean the front surface of the glass panel using the cleaning cloth provided with computer or the cloth provided with the cleaning starter kit. If the contamination remains after cleaning the front surface, determine if the contamination is caused by residual moisture or particles of dust or smoke on the inside surface of the glass panel or LCD.

2.Is the affected area located near the lower right region of the display and the does the area change in size as the computer warms up or cools down?

Yes: This is most likely the result of water vapor, trapped between the glass panel and the display, condensing on the inside surface of the glass panel as the iMac warms up. The condensation should disappear on its own after the computer has been running continuously for several hours and should not return thereafter.

No: Go on to the next step.

3.Is the affected area mainly in the upper region of the display and it doesn’t change in size or location as the computer warms up?

Yes: An accumulation of dust or smoke from external sources may exist on the inside surface of the glass panel or display. Clean the inside of the glass panel following the cleaning procedures in this manual. Note: Certain types of ultrasonic humidifiers, when used with unfiltered tap water, may generate a very fine mineral dust. Although the dust is invisible to the unaided eye, it can accumulate inside the iMac. Many humidifier manufacturers sell mineral filters to prevent these minerals from becoming airborne.

Heavy concentrations of airborne smoke from cigarettes, cigars, cooking, etc. may, in rare circumstances, accumulate inside the iMac. Ask the customer to evaluate their work area to make sure that ashtrays and other sources of smoke are not placed in close proximity to the air intake ports on the lower portion of the iMac.

No: No other action needs to be taken. Return the computer to the customer.

iMac (24-inch Mid 2007) Take Apart — Symptom Charts  216