Question Rx 550 no signal

[DenysV]

I installed a new rx 550 and it shows no signal on monitor
I removed the cmos battery
I uninstalled the old gpu drivers
But still no signal

 

[rgd1101]

full system spec? include brand and model of the psu

 

[DenysV]

full system spec? include brand and model of the psu

I5 2400
Ga-h61m-s1
Amd hd5450
Seasonic b12 550w