POE not working on some interfaces

[letto55]

hi. on cisco C9200L-24P-4G i have a problem. on some ports POE doesn't work. when i connect a device,it shows faulty condition on that port. i have also checked that device on another switch and it works. cables also checked. this problem is on some ports only,other ports work correctly.

[Kasun Bandara]

check console loggins for poe error messages. share it here. most of the times error comes due to HW failure. if that i s the issue, need to RMA device

[Flavio Miranda]

How many PoE devices do you have on this switch?  most switches does not support all ports with PoE devices. You need to do the math. How much power does your PoE device consume, then, see the Power supply maximum power and see if it is possible use all ports.

Modern PoE device now a day consume a lot of power. One Access Points for example is 30W and some cameras even more.

[Martin L]

I agree; it happen to me when my  switch did not have enough power for all PoE devices if they are "hungry" 

there is a command from which you can check the power budget to see how much is free or available, how much is used.

Regards, ML
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[balaji.bandi]

run and see any failed :

#show diagnostic switch

[mohammedshahidali88]

Check 

show power inline

show environment

And also check how many power supplies you are using and has enough input to the switch.

Need to check the IOS version as well if any Bug is creating the problem.