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hi, the mac is turn on chime with logo for 1-2 sec and black screen...i sew liquid damage on U7320 and i was clean and replace, but the same..no other liquid area...i was notice that it dont recognized other ssd hard drive and can boot from external drive..any idea?
Try first to see what happens starting in SMC bypass mode.
Does the machine stay on in boot menu?
Also try the board alone, disconnecting LIO flex and trackpad.
Use onboard USB port to connect external mouse and keyboard.
Keep out any other device, apart of LCD; no SSD, nor airport.
im sorry, it can't boot from external drive...in SMC is doing the same..at boot menu is staying...after logo and black screen the fan keep running normal..
i will try your suggested..
Thanks for your replays...
My external ssd is catalina checking boot drive...
O.k this is what happens so far..
The mac "original" ssd get black screen after the chime and the logo..
When i put a different or external usb ssd drive it not recognized them ( question mark folder).
I was try to enter apple diagnostic but it let me just pick a language and dont do nothing(not shut off)
Do not enter to recovery mode.
SMC- the same(logo and black screen)
Internet recovery- stuck on "5%" loading...and time is getting longer
i think its something with the ssd line or something like that...
"Try known good BIOS clean ME."
i dont have how yet...
"Did you try both USB ports?"
yes, the macbook recognized it but when i choose to boot from it it start logo and black screen.
"i dont have how yet"
Don't you have an USB programmer?
Remove U6100 and flash it.
Of course, Medusa programmer can do the job onboard; get it, if you plan to repair Apple stuff...