I can't seem to find a 5v supply

I gave up on this laptop but now I'm determined to get it going again.

When it's plugged in, the white light is stable and the battery charges.

When I press the power button, it switches on then goes off after about 4 seconds and restarts again in a constant loop until I remove all power.

Any help will be appreciated 👍🏻 👍🏻 👍🏻 👍🏻 👍🏻 👍🏻...

Hi.

If I disconnect the battery cable, it does exactly the same. Unbelievably laggy and full blast fan.

Interestingly I just found this video and believe this could be the solution. Apparently it's a particular quirk of this exact model.

https://youtu.be/xT-frKkgxHc?si=D5XnEL8YHW_alS_S...

I just changed the screen on a Macbook A2179.

On restart, it boots up to the password screen but any movement on the touchpad is extremely laggy and the fan spins up to full speed.

I tried checking all the connectors which are all in place.
New thermal paste on CPU.

Also noticed the battery is not charging either and shows a battery sign in the top right hand corner with an exclamation mark in it.

I have schematic and boardview if anyone can help me with this?

Many thanks.

Hi.

Long shot but does anyone have a schematic & boardview for the audio board+power button on a Macbook A2179?

There is a shorted cap on mine and I need to know if I can safely remove it or whether I need to replace it and with what capacitor.

Many thanks. ...