Welcome to the Dell Community  @shail5991 

Sorry but the CPU is soldered to the system board and cannot be upgraded.

Dell OEM Inspiron 15 (3552) / 14 (3452) Motherboard System Board with Intel Celeron N3060 DualCore 1.6Ghz - PW4MN:

https://www.parts-people.com/index.php?action=item&id=25085

Best regards,

U2

Hello, I also have the same issue. 

Welcome to the Dell Community @Littlemike 

NO.

Please read my other post above.

Best regards,

U2

Sorry littlemike

The processors on this line of boards are soldered in place...

And by soldered, I don't mean that there are a couple contact-points soldered to keep it in place.  These are BGA (ball-grid array) mounted components.  Basically instead of having hundreds to thousands of tiny pins that fit into a socket (like in socket mounted cpu's) these BGAs have hundreds to thousands of tiny balls of solder precisely laid out on the board, then the CPU is precisely placed and all of those tiny balls of solder are melted at once...

Successfully removing/replacing BGA components requires specialized equipment and a high degree of skill.

Bottom line: while it is technically "possible" to swap BGA components, it is not at all easy, and the chance of destroying the board in the process is very likely without the correct specialized equipment.

It would be cheaper, easier, and much less stressful to simply buy a computer with the specs you want.

Unless this board is already destined for the rubbish-bin, and you have BGA soldering equipment on hand, wait and save your money for the  hardware components you want.

Sir, what if I change the whole motherboard and I am having one more problem that is my Inspiron 15 3552 model's motherboard is 00NY5.

Even that has limitations -- see below for board/CPU options.

https://www.parts-people.com/index.php?action=category&id=141&subid=587&refine=motherboard

You will likely find that replacing the system with a new(er), more capable model is a better use of funds.

@ejn63​ What if I change Motherboard From Dell Inspiron 15-3552 To 3558 That has Intel Core i3 The Case Looks Similar.

It isn't clear what you're trying to gain, but if that's what you want, complete, used and working Inspiron 3558 systems start at about $30 and are widely available for well under $100 -- it'll be cheaper and simpler to buy a replacement system than a separate mainboard, even if it's possible to swap the board.

@ejn63​ I Have Dell Inspiron 15-3552 With Celeron N3060 1.6ghz 4GB Ram  I Found A Motherboard of Dell Inspiron 15-3558 Intel Core I3-5010U

I Fount it For 20$ Used I wan't to Swap Motherboard Because This System I have it is Too Slow.

If you already have it, you can try it -- if not, be absolutely sure everything including the external ports, internal screws, etc. lines up.  That's very rare between different model series.