A 4 beep error code indicates a memory read / write failure.
Disconnect the power to the laptop and try reseating (remove/replace) the memory module and check if that resolves the problem.
Here's the owner manual for the laptop that may help.
Go to p.15 to view the procedure. Assuming that the battery is still not installed, you can skip the pre-requisite step.
If it is still no good after trying this it may be a faulty memory module. According to the specifications it uses DDR4 2400 SODIMM ram, 8GB max.
Try inserting a new compatible ram module and check if it works OK. If not then there's a problem on the motherboard
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