Power Supply query

Dell does have 240w power supply for your OptiPlex 3050 MT.  It costs around $44 USD.

https://www.dell.com/en-us/shop/dell-240w-power-supply/apd/j61wf/computer-chassis-components#compatibility_section

Auction site has plenty of power supply with Dell part J61WF for around $20 USD w/free shipping to US address.

Dell power supply has a propriety built shape and power connectors.  You can use other brands power supplies with a 24-pin to 6-pin cable.  But, it's very limited in shapes and sizes, and will cost you more.

The thing is when i contacted service centres here in india they told that this model from 2018 ( model no cnhcrj2 ) dosent have any support now and they dont sell any of the parts required and this pc is really important to me and they told the there is no way to fix it now
it will ne great if someone gave me a tutorial on how to make this come to life again