Hello! It's unfortunate to hear that you're facing another problem with your Redmi Note 11. If the phone is not powering on and only vibrating, it could be due to several reasons. Here are a few possibilities:
1. Software issue: Sometimes, a software glitch can prevent the phone from booting up properly. Try performing a force restart by holding down the power button and volume down button simultaneously for about 10-15 seconds. If this doesn't work, you may need to consider other solutions like flashing the firmware or performing a factory reset. This can be done by a professional technician or through Xiaomi's authorized service centers.
2. Hardware issue: There could be a hardware problem such as a faulty power button, damaged motherboard, or loose connection. These issues are more complex and require professional diagnosis and repair. It's best to take your phone to an authorized service center for an accurate assessment.
Regarding the repair cost of 2,500 pesos, it's difficult to determine if it's reasonable without knowing the exact problem. However, it's advisable to compare the cost with other service centers or authorized repair shops to ensure you're getting a fair price.
Remember to always back up your important data before attempting any troubleshooting steps or handing over your phone for repair. Good luck!