Why does Display Backlight light up only briefly?My daughter's MacBook (A1181, 2.4GHz Core 2 Duo) has a display problem. Some of my observations have already been mentioned i...
Answer to: Why does Display Backlight light up only briefly?The end-of-story. My theory: The "inverter" is a switching powersupply with low voltage DC input, chopping, transforming up (coils) to produce some higher voltage DC for the backlight lamp. If the lamp has a short, the PSupply runs into current limitation with the output voltage collapsing. Hence, the backlight lamp must be replaced --- or a new display must be purchased. Back to reality: A new display is bought. I ordered the same Samsung type (LTN133 AT002-001), but got a Toshiba (LTN133 other-bla). Dismantling once more is required, because the power-plug has to go into the inverter. Now, TEST the Macbook with everything dangling, i.e. held by sticky tape. - Boot-up - VOILA, the Macbook is a fully functioning laptop with high-gloss screen. The re-assembling is not a big adventure anymore (you might call it "experience"). My daughter has her beloved Mac back; I am grateful to everybody in the forum, who gave useful hints. PS. I keep the inverter. It will never break as long as i have a spare.