SHIHAM IFTHIKAR

if it is AC powered LInk

Please find the link below, check the amp and voltage is the same. link

check the below link Link other refference Link 1 Link1.1 Link 2

Press and hold the reset button for 10 sec. it will restart and check after 5 min. if you are getting new wifi siganl. if not connect a network cable to the router ( LAN Port), and the other end to the laptop. check if the laptop is connected to LAN, if not the router is defective. if yes open the command (CMD or terminal) in your laptop and type ipconfig /all and press the enter key it will give the ip address and gate way enter the gateway ip address in the browser and check if you can access the router configuration page. login to the site and configure the wifi.

Go to istore and get it replaced with a dual sim phone, or ask them to buy back the 12 and buy the 12 it will take some time for the modification parts , will have to wait for a long time ``Link``

it looks like a battery issue, did you try to switch on without the battery

(1) Restart the computer. Immediately after the chime hold down the (Command-Option-R) keys until a globe appears. (2) The Utility Menu will appear in from 5-20 minutes. Be patient. (3) Select Disk Utility and click on the Continue button. (4) When Disk Utility loads select the drive (usually, the out-dented entry) from the side list. (5) Click on the Erase tab in Disk Utility's main window. A panel will drop down. (6) Set the partition scheme to GUID. (7) Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.) (8) Click on the Apply button, then click on the Done button when it activates. (9) Quit Disk Utility and return to the Utility Menu. (10) Select Reinstall OS X and click on the Continue button.

Go to the BIOS and check it , it is sharing the memory with the VGA even though it is showing dedicated VGA but if you reduce the VGA Memory it will have some performance issue like when playing games, or 3D applications

it looks like the Screen inverter has gone defective you will have to replace it, The display inverter is the circuit which gives the power to the screen backlight. connect to an external monitor and check if the display is coming, if it is coming then you will have to find an inverter online and replace it. you can buy the part from here: LINK i would suggest replacing the laptop since it is outdated, if the circuits starting to fail most probably other issues will come in the future

Please check the below videos VIDEO1 VIDEO2 VIDEO2 Parts LINK1