Mid-2007 A1181:
I broke the little flat lead from the IR sensor and Sleep light to the SATA connector block
Buy swapping HDDs without the rubber guide rails to protected said flat lead...
NO POST! Nothing.
Battery charges only
And these parts are bonded / glued / molded into the bottom case..
No one has them on eBay.
So I bought another bottom case cheap on eBay.
$6 with postage!
No mint but not bad...
Flat lead and related parts look good...
( One CAN plug in the flat lead upside down, but it's path way is then un-natural)
No Joy! No change..
Resetting SMC and other quick fixes... ZIP!
I'm thinking the keyboard start button is bad or it's flat lead is...
I'm a retired Camera repairman
Worked as a volunteer recycling Macs 2000 -2008....
Have had Macs from the SE-30 in 1999, on to my 2009 Mac Mini...
Given to me by the program... late 2011....
Have worked on Laptops from my 1999 PowerBook G3/400 Lombard
Also given to me by that program in 2008..
Had to replace the power board and keyboard in 2014....
HP TX2000 GPU drama queen.... you do not want to know...
Several IBM ThinkPads from 2004 to 2009 (Linux)
Stripped to the bare cases when needed...
Work great....
Have a Late 2008 MacBook AL with NO SCREEN
Use it with a 19" Acer Monitor...
Rather like a 21st Century Timex Sinclair 1000
VERY NICE!
IT'S LCD / Flat lead woes are depressing...
Parts sellers on eBay can send you the wrong parts
NOT what the have pictured.
So Apple INC calls me a TAMPERER!
Think iPhone Code 53 Bricking of a year back.
Security screws
Epoxy screen layers.
IBM is SO much better to work on..
I hope my experience helps...
I'm stumped with the White Book...
J.C.