Hi Rohit, So if your iPhone is looping the Apple logo the most likely cause is the battery. During the boot cycle of an iPhone the Phone swaps to battery power for a period of time, if your battery is faulty then it will show the apple logo for a few seconds then cut out and start again repeatedly. I would suggest buying a new battery from Ebay and replacing yourself as this is quite simple. I fix supply the kit listed below: iPhone 6 Battery

Personally i would look for a new device! as mentioned above by another user - these models are renowned for issues! A few notes: A second hard refurb board can be found online from anywhere between $200-400+ , in contrast you can get a second hand Retina MacBook 2015 for around $500-600+ on auction. After looking into the above two options another $800 seems a little steep, i would put that money towards a new device and sell the Macbook as spare and repairs working screen for $200+ on ebay or somewhere similar

the only legitimate way to know if by checking the flex cables the flex cables when original from apple will show the Apple logo (see below)

Hi, So first things first, take the case off using the ifixit guide and give it a good clean, even though it may not feel hot dust build up can cause this issue. failing that…. next thing to try is the power supply, if you have a friend who can let you borrow theres great or buy one from ebay etc… ( the 2 beeps generally means a hardware issue ) falling this i would check the thermal paste and replace as this burns out overtime and can cause the PS4 to shutdown as you described. i hope this helps :)

digitizers stop working on newr updates due to cyan and amber not allowing non genuine digitzers to work-- something to do with ic chip and settings on firmware :) downgrade if you get this problem and hard reset nor screen change fixes it :)

its the software/firmware.... amber and cyan only work with genuine original digitizers only option is to downgrade but just make sure you have all the files and correct rom :)