wirelessplanet
Member
board is booting up but has no backlight. tried with another screen (although i'm not sure if that was a known good) and still has no backlight. PPvout_s0_lcdbklt isn't short. would appreciate some help on this one.
-
For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.Subscribe Now
820-01041
- Thread starter wirelessplanet
- Start date
Get internal image, only missing baccklight?
Tested external video and USB activity?
Any history available?
Tested external video and USB activity?
Any history available?
wirelessplanet
Member
not much history available, but board is clean. this has been in my box of boards to fix when have free time(most likely customer wanted a board replacement). Looks like C9081 was shorted, because it was removed to probably get data.
internal image working. external image is working. usb is working with external keyboard and mouse.
i saw some earlier posts that say to try and a dfu restore which i did along with a fresh install of sonoma and it still has no backlight.
getting 55v on ppvout_s0_lcdbklt
D8410 - looks to be good
A-K not shorted
is the enable line suppose to have a diode measurement? i'm getting OL on tp_lcdbklt_en_l...maybe this is the problem?
internal image working. external image is working. usb is working with external keyboard and mouse.
i saw some earlier posts that say to try and a dfu restore which i did along with a fresh install of sonoma and it still has no backlight.
getting 55v on ppvout_s0_lcdbklt
D8410 - looks to be good
A-K not shorted
is the enable line suppose to have a diode measurement? i'm getting OL on tp_lcdbklt_en_l...maybe this is the problem?
Last edited:
55V is like open LED strips.
Test with known good LCD assembly.
Test with known good LCD assembly.
wirelessplanet
Member
i ordered a used lcd from ebay. ill let you know.
wirelessplanet
Member
new lcd same issue
Check continuity from D8410 to J8500.
If good, save data and try DFU restore.
If good, save data and try DFU restore.
wirelessplanet
Member
ended up being that stupid little lcd flex cable.