ian, This is a USA base store but they sell the screen but just to let you know Samsung screens are not cheap they cost but click on the link and you'll find what your looking for and I believe they ship out of the country too. https://www.fixez.com

I've worked on hours on iphones that have boot up issues and some can be cleared by connecting to iTunes and some can't. Its a software glitch that can't be repaired no mater if the battery is replaced screen or anthing else. At that time its time to replace the phone. If you tried going into Recovery Mode the last resort is DFU Mode: I have attached an artctle that explains and also helps you to do that just click on the link. https://www.ikream.com/2018/02/how-to-fix-apple-iphone-6-boot-loop-blod-and-other-power-related-issues-troubleshooting-guide-23912

Low memory issues can arise when you have too many applications on your ZTE Max + or when you need to clear your application cache. Click on the link to help you through the steps to clear this issue http://devicehelp.boostmobile.com/docume...

I know you this is a silly questions but I'm pertty sure you know how to replace the toner catridge and reset the counter on the new toner catridge. Click on link for example http://download.brother.com/welcome/doc1... You can also try to reinstall the driver on your computer that sometimes helps too. click on the link for user manual on your model: http://download.brother.com/welcome/doc1... I hope this information helps

It sounds to me that the screen is broken and the LCD got damage when it fell on the concrete. All you have to do is take it to a near by shop to see if they can order you a screen or go online and look to purchase a screen and replace it. Any questions please let me know.

if you have the orginal home button on there its probably the connector, circuit board, or software glitch. If you have a aftermarket home button it will not work. It has to be an Apple home button which you could get a Apple but they have to install it. Or just disable the home button and use the accessibility buttons on the screen as your home button.

it could be your button or the motor accuator assembly for the window to move up and down. Most likely its the motor accuator assembly that went bad. Open the side panel of the bad window and see if the motor and gears with the cables are damage or worn out.

Sounds to me that the Ribben cable is defective and every time you bend the cable it starts to give you problems. It sounds that you did everything right, what it is a defective LCD you bought contact the seller and have them warranty the new screen you bought.

Have you tried a force reset. Hold the power & home button at the same time until you get "power down" screen turn off wait 20 seconds and turn back on.

Could be a defective screen and battery. I would take back to warranty the work. Second the heat could be because the battery is a cheap version and causing the phone to over heat at times. Three'd thing the screen glitching is a sign of a defective screen or the flex cables could be Pinched or damage during the install. I hope this helps