My M3 MacBook Pro is not turning on

Charge the device for a minimum of one hour. Deep-discharged Macs sometimes take 20–60 minutes before showing any sign of life. Don’t unplug/replug too quickly.

Just to let you know, you can use a 96W USB-C Power Adapter or an Magsafe charger.

utsav37 wrote:

I kept it on charge for 1.5 hours on 60-watt MagSafe charger, and there was no response. My main concern is whether 5 days of the battery being dead is enough to cause permanent damage to the battery?

If done once, it's not typically permanently damaging.

If you allow deep discharges often, then real damage is likely being done.

You might try connecting the laptop to the charger and then pressing and holding the power button for 10-15 seconds. Release the power button and then press it again to restart the computer.

Leave the computer on the charger for another hour as @SravanKrA has posted.

If you cannot get the MBP to restart, then you may need to make a trip to your local Apple Store for further evaluation and guidance.

You can make a Genius Bar appointment for hardware/software service and support using this link: Contact Apple Support - Apple Support

Looking forward, the best practice for keeping the battery healthy include:

• Plug in when using the computer near available power.

• Use on battery when ac is unavailable or when you must be mobile.

This is Apple's guidance for battery care:

Batteries - Maximizing Performance - Apple Support

About battery health management in Mac laptops - Apple Support 

utsav37 wrote:

My mac was running low on battery and I completed my urgent work late at night and let it be, thinking i would charge it the next day. Then the next couple days i didn't have any work on my laptop, so i forgot to plug it in. After about 5 days, when i tried to charge it, it's not accepting power. I tried a different MagSafe, I tried USB-C nothing is powering it on. I looked into this issue and then saw that Apple batteries might go into a deep discharge state. Is that most likely the case??

I did test how much power it was taking and it says 5V only, so it might also be a logic board problem, but with no bumps or fall and no liquid contact, I don't think the logic board has just been damaged when kept unused. I'm very confused and concerned about what the problem is. Does anyone have any suggestions or solutions to this problem?

you can try— Unplug the "power adapter" from the wall, wait 60 seconds, then plug the adapter back in to reset the internal microprocessor

reference:

If your Mac battery won’t charge - Apple Support

If your USB-C power adapter isn't charging your Mac laptop

If your USB-C power adapter isn't charging your Mac laptop - Apple Support

If your MagSafe cable or power adapter isn't working

If your MagSafe cable or power adapter isn't working - Apple Support

When the battery becomes discharged, the power level in the computer is so low that the logic inside the battery can not run a regular charge cycle. Therefore, the battery will indeed trickle charge at 5 Volts only when connected to power.

That will take at least overnight, connected to a competent power adapter, to get enough charge for it to be Possible to charge in the regular way. And it will take a Deep Reset to encourage it to try to charge in the regular way.

Apple-silicon Macs do not have a documented Deep Reset, but starting from power completely OFF, a rapid double-press of the power button may be the best you can do.

utsav37 wrote:

The board itself, even after disconnecting the battery, took only 5V, so the repairman said it's a logic board issue.

Of course it only took five volts. That is all it draws while trickle charging. all they are telling you is that it is not doing a regular charge cycle.

It costs you nothing to connect it to power all night long and see if you can reset it and get it to charge in the morning.

Same thing happened to my M3 Pro! I think the battery drained for 3-5 days and when I started to charge it, there's only the orange light from the magsafe charger and a display of battery charging. Left it on charge for more than 24 hours but still no luck! I'm taking mine to the apple store tomorrow.

utsav37 wrote:

I put it on chaege for 5 hours and still there is no light on the magsafe and no sign of turining on when pressing the power button twice

The lights on the MagSafe are turned on by software running in the computer. That is only possible when the internal charge level is returned to nominal running Voltage, which takes Many hours of trickle charging at the 5 volts level.