Sounds like you didnt reseat the wifi module properly, or as you were dismantling it you cracked part of the ribbon cable.Check , reseat, or replace the wifi module. I assume you tried doing the cold reset and switching in amd out of airplane mode, this is usually a fix for airplay too when that “greys” out.Hope this helps.

Sounds like the boot sector of the internal drive is corrupted.Try using another computer to download ubuntu to a usb stick.Google this to follow the instructions.What you need is Gparted which is a version of Partition Magic. Then Go to the machine you have trouble starting and try to alter the boot sequence to USB from startup.No need to install linux, just run it from USB and let Gparted …you may need to disconnect the internal drive and load the usb linux first.Then reconnect drive and rescan drives using Gparted.It shoukd allow you to read the files and correct boot record. It is possible to copy the contents to another drive and or correct the boot sector.I wouls save any files BEFORE changing or correcting the drive.There are other tests you can run to see if the drive is failing of full of bad sectors. I have also done this on a windows machine.Also you cam use Hirens boot disc.Again google, download Hirens to USB and connect the internal drive via correct leads to the windows machine.Start USB...

Green is the same as yellow for this purpose....but I think you should be able to change the audio settings from with the tv menu....sometimes there is more than one channel....because the tv needs to switch from internal tuner to external devices....for audio.As for no signal..again once your yellow cable is connected to a scart convertor with rca inputs you should be able to select av1 or av2 etc through the tv menu. I would have thought if the nintendo has hdmi out...that port also covers audio...but you need to select passthrough.

Tablets are notorious for remembering false inputs ...the quickest solution if you know you have not changed your password...is to rescan the network and when it finds your router...click on forget this network....rescan again and it will ask for your password without having any internal records stored...if that fails ...then ..it is possible the routers password is at fault...look at switching the router off for 30 seconds then restart the router ..go back through the previous steps...if it still will not connect...then you need to find the isp address for the router and its login .and check those settings.

You may have fastdetect with no timeout for boot set in the bios options...this can be verified msconfig screen by reading the boot ini file....if this is not the case ...try updating bios firmware for the board.

Check the charger...if it only outputs 1 amp at 5volts....check if the phone will accept a 2.0 amp charger ...this reduces the charge times considerably.Most phone chargers are rated 2 amps .If it is 2 amps...try a different charger before you decide to replace battery. Charging any rechargeable battery requires you to alternate between 80 % and 20% mist of the time and full drain and full charge occasionally....this will extend the life of Said battery.

Check the cd tray flap is all the way in....Secondly use the USB port that you first used when you installed the printer....otherwise the computer may not recognise it....if you find front USB ports are not always responding to connections..consider using the rear USB ports as these connect directly to maotherboard and are more reliable.

Have a look on the front panel of the optical drive and see if you can spot a tiny hole.....this for such incidences....find a toothpick or strong needle..and try to push slowly into the machine via this hole...it should release the front panel enough to attempt extraction...but if it sticks then you might have to think about removing body shell.

Try a free software called ifunbox..... there is another programme that reads apple stuff without the need for iTunes to be running..unfortunately most software to read off Apple hardware requires iTunes running in the background...I assume your phone does switch on.Did you ever use iCloud?It is the best way to safeguard against loss of data. Finally if you cannot get apple or windows to read the phone...try using Linux driven from a USB stick....you need to google Linux USB then install on a small USB stick (2gb) then choose from bios to start from USB...once it is running ..connect phone and see if it has been discovered...if these fail to help you....it may be possible to buy a donor phone from eBay and swap the logic board on a working phone and use iTunes to read that.

I think can only be done by hardware methods...the chip that stores the code has to be unsoldered and cleaned and put into a special reader writer programmer that will remove the password flag without requiring the code....the solder points on the logic board also have to be cleaned and then it has to be resoldered....time consuming and complex....these people who offer unlocking services are doing a soft software alteration that gives you access to part files of the phones capability but not full functionality. Apple should offer this to people who have phones that they inherited from relatives who gave passed on etc...but let's face it Apple are only interested in milking everyone dry.....whilst retaining customer loyalty....from customers...not providing service and loyalty to their consumer base will cost them in the long run....Android users have already realised this.