A laptop that will not start, or that starts and then runs poorly, is a different complaint from a cracked panel. At SAI Laptop Service in Electronic City the motherboard is one of the six parts on the shop board, with the charger, battery, hard disk, RAM, and keyboard. It is fitted when that part is the fault. This counter is not a shop for a loose desktop processor, and this page does not name a price for a chip.
What else can look like a board fault
A display that stays black while the fans still run can be the screen, a cable, or the board. The counter inspects it before naming the part. A slow machine can be a failing hard drive, which is replaced with an SSD or a new drive, or it can be malware, which is cleaned. Heat from the fan and heat sink can shut a laptop down. A dead battery can look like a machine that will not stay on. Those are separate jobs.
If the laptop will not start, call 099724 47766 and say so. The quote comes before any paid work, and it names the part if one is needed.
The board and the other jobs are on the services page. See also computer repair and Computer technician near me.