Sounds like a bootloop which is caused by either a faulty or missing component To fix it you have to find out which component is causing a bootloop and replace it, usually I would just get a replacement housing with small parts installed, otherwise its usually the battery or camera or (hopefully not) motherboard damage
To stop the genuine message, either update to latest software AND use an apple original battery (pricey), or get a battery with extended tabs and spot weld it to original battery's bms (risky)
Use a spot welder and weld a small piece of metal to the stripped screw, then use the welded metal to turn the screw This works well if the screw is easy to reach, but in my laptop the screws are in an indent so it wouldn't work too well then
أعتقد أنّ هذا مشكلة بالجوّال نفسه، ليس بالشّبكة يمكن أن تغيّر هوائي الشّبكة أو تتّصل بشبكة أخرى، وإن لا تعمل، فالمشكلة هو الجوّال، فقد أتى الوقت لجوّال جديد
You probably need to replace the fan If it's really loud then it is probably trying to compensate for an old heatsink, and still is not enough so the function key area is heating up Replace fan and heatsink and you should be good to go
I did something like this to an old Galaxy Mini S5570 Warning: Microsoldering involved, do this at your own (much higher than normal) risk (1) Disassemble the phone (2) Remove the motherboard (3) Use a heat gun and low-melt solder to remove the charge port (4) Lightly tin the pads of the new charge port (5) Solder the new port in place (Small soldering iron tip and microscope are useful) (6) Reassemble the phone