My iPhone 3G's power button is broken and it's in recovery mode.

So I’ve recently received an iPhone 3G 16gb for free, It’s pretty old and has a bit of yellowing on the white back and accessories, but everything appears to be fully functioning (charging cable etc.) except the power button, which is missing. It’s not only that the button itself is missing, but the plastic between the button and the metal frame is also missing, and not only that, but it’s stuck on the iTunes screen. I’ve tried a few things; tried to recover it using iTunes - Error 1015,

tried to use RecBoot with iTunes to load iOS 4.2.1. on it - RecBoot is broken and can’t find the iPhone in recovery mode.

tried to fix the error by using redsn0w and flashing iOS 4.1. with latest firmware on it but - the power button’s missing and I’ve tried to: squeeze the top corner and click it with a key, usb-c cable and the little tool you get for your sim tray. None of them worked.

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Now here’s a few more things I can tell You:

The phone doesn’t appear to be damaged by any liquids,

When squeezing the top corners next to the missing power button, I can hear a little noise

There’s a bit of a gap between the metal frame and back cover of the phone on the right-hand side and top of the phone, the gap increases as it goes up the side of the phone and ends at the top left corner.

I’m using Windows 10 on my Lenovo ThinkPad to try all of these fixes.

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I apologize if someone has already posted a fix to this issue, I’ve tried a few guides on this, nothing’s working and I’m sorry if there’s already some kind of fix on the forum here, I just made my account today - as of writing - and I hope one of You could help me solve the issue I’m facing. Thanks for reading!