What is the danger of such a crutch?

Question

Batteries

In general, they brought a laptop (lenovo z510), the diagnosis - it does not turn on. There was no reaction, when the charger was connected, even the indicator did not light up.
I called, I noticed that if you take "+" from the power connector and ring through the contact of the microcircuit under the number 1, then there is no reaction, the same microelement under the number 2 is called without problems. (under the microelements marking PL101 and PL102 respectively)
It was decided to connect with a wire directly (as shown by the blue line) "+" from the power supply from the connector to the microelement under the number 2.
It worked, albeit with some reservations (it works both from the battery and from the network, but while working from the network it is better not to remove the charge, otherwise the laptop turns off completely), the load holds, the main voltages are normal, there are no global problems yet. (it was also noticed that once every 2-3 minutes, charging can lose contact and the laptop runs on battery power, then after 3-4 seconds there is contact again)
What is such a crutch fraught with in the future?
PS Yes, yes, I know that this is not done, and somewhere in the service they would have broken my hands, but we do it as best we can, especially since the person insistently asked that we be the ones who would take care of the laptop. ("we" is me and a friend)
PSS I apologize for the quality of the photo, it was taken on a smartphone during a smoke break.

Answer 1

Maybe not PL102 but PL201? Then you applied power from the adapter line to the battery line. What's bad:
* supply voltage is supplied past the fuses
* supply voltage from the adapter is supplied directly to the battery, past the charge circuit, most likely the PF201 fuse has already blown or the battery has gone into protection The
laptop does not switch to battery power, because from the point of view of the controller it is already on the battery and you don't need to go anywhere.

Answer 2

The photo is not informative, but we can assume that the key that opens the charger burned out and you let the voltage go directly to the MP. Similar keys are in the battery management. As long as everything is in order with the BP, this Frankinstein will live for a while. Good luck.
PL is the input and battery filters, respectively. Apparently PF101 burned out and there must be a reason for this. It would be better if you did not do all this.