Why is the blade making unusual noise and stopping after a few seconds
Firstly where shud the spring ends be placed while reassembling the parts
And the trimmer is making unusual noise and stopping after a few seconds
Siddhant dhandhania , Make sure the head is clean and undamaged,try lubricating blade very lightly, ensure assembled correctly. If all looks good and still stopping after a very short time batteries could be worn out or motor may be on it's way out. If still under warranty use it for replacement/repair/refund. Use the link below to aid in blade installation. Good luck.
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i get this on mine, its usually Jammed. i lucked out and baught a water proof model. so i just run it under the tap, and its good to go. i know this probably doesnt help, but its better to try before replacing it.