Thanks to everyone!!! Raspberry community is very helpful. Although I haven't seen that bolt icon since that time , I ordered the official power supply as suggested by some senior members here. Thank you guys.

R pi 3B, Using an HDMI to VGA adapter bought it because someone on Reddit said audio would work even if the adapter doesn't have any jack on it. Now I'm not not getting any audio output https://www.raspberrypi.org/documentation/configuration/audio-config.md Hi , did this. I'm able to hear audio on ...

using Raspi as main desktop. on raspabian. I need to read PDFs a lot so wanted to install Redshift so far i have tried every available method but it doesn't work .. have enabled openGL too. can someone point me to a tutorial or tell me what to do please? https://i.postimg.cc/VkSQDMKR/2018-09-24-0814...

The power adapter I'm using an adapter which outputs DC 5V,2A and I'm using a usb mouse (500mA) and a USB keyboard with HDMI to VGA adapter.
Should I change my power adapter? Samsung charger would work fine for a long run?

Some I picked
https://www.crazypi.com/Raspberry-Pi-2-Power-Adapter

R pi 3B, Using an HDMI to VGA adapter bought it because someone on Reddit said audio would work even if the adapter doesn't have any jack on it. Now I'm not not getting any audio output