Possibly a logic board problem. It could have been damaged or have a hairline crack somewhere when the screen was damaged or even during the teardown procedure to install the new screen.

[quote|customerservice]Possibly a logic board problem. It could have been damaged or have a hairline crack somewhere when the screen was damaged or even during the teardown procedure to install the new screen.[/quote]

Do a double check at the inverter cable connector on the motherboard. Check if the connector is well seated in the socket. Another possibility could be a bad connection of the inverter cable to the inverter board in the screen assy.

[quote|lemerise]Do a double check at the inverter cable connector on the motherboard. Check if the connector is well seated in the socket. Another possibility could be a bad connection of the inverter cable to the inverter board in the screen assy.[/quote]

Strange... Exact same story here. Cracked my original 15" MBP screen LP154WP2(TL)(A1) and order a replacement and the company told me the (TL)(A3) would work. I put it in and no backlight (dim screen, still can faintly see image). I replaced my inverter board as well. I have a feeling the A3 might not be compatible with the A1 since we have the same story...

[quote|Daniel]Strange... Exact same story here. Cracked my original 15" MBP screen LP154WP2(TL)(A1) and order a replacement and the company told me the (TL)(A3) would work. I put it in and no backlight (dim screen, still can faintly see image). I replaced my inverter board as well. I have a feeling the A3 might not be compatible with the A1 since we have the same story...[/quote]

Just only need change inverter card. Sure it shoul be working well again.

[quote|nguyen]Just only need change inverter card. Sure it shoul be working well again.[/quote]

I've the same problem with my Macbook pro.

In the beginning I thought the screen wasn´t compatible, so I tried with the old one, but it didn't backlight nether (I did backlight before replacement). Hence I resolved something else was damaged during the replacement.

LED screens don´t need an inverter, backlight leds are directly feed from the motherboard thru the flex cable. I tested the cable and it´s ok, the motherboard isn’t giving voltage for feeding the leds.

There is motherboard damage and I don’t know how to fix it, comments will be appreciated.

[quote|Patrick]I've the same problem with my Macbook pro. In the beginning I thought the screen wasn´t compatible, so I tried with the old one, but it didn't backlight nether (I did backlight before replacement). Hence I resolved something else was damaged during the replacement. LED screens don´t need an inverter, backlight leds are directly feed from the motherboard thru the flex cable. I tested the cable and it´s ok, the motherboard isn’t giving voltage for feeding the leds. There is motherboard damage and I don’t know how to fix it, comments will be appreciated.[/quote]