Laserjet 5Si drawer won't close

[RJL3]

Someone else posted this exact same issue over a year ago and describes my issue to a T.

The black huge piece of plastic has two hooks where each tray locks.

The hook for Tray 2 has broken off.  Oddly, another poster had the EXACT issue last year.

Is that black plastic part of the frame or is there a separate part number?

[Repairatrooper]

Suggest you find the service manual from one of the many online sites that offer them. Finding the part will likely be more difficult than the manual. 

[RJL3]

Thanks for ChrisMN1 for his question, I was able to remove the PIU and attempt a two part epoxy repair for a broken Tray 2 tab.

However, there's a mysterious white part that was loose inside the black plastic casing.

Can anyone tell me how to find out where it goes and how to put it back in?  Do I have to totally disassemble the black housing?

Pics 1 and 3 show white part

Pic 2 shows the tab that needs to have epoxy to repair.mystery white partbroken tabmystery white part

[RJL3]

Thanks to ChrisMN, I was able to remove the PIU and attempt repair, however, mystery white part was inside cavity.

See my other post for pictures.