no signal to monitor

[elnadav12]

i5-7500(asus's website show that the mobo supports it)
8gb hyperx ddr4 2133mhz
asus b150m-a
corsair cx430
arctic freezer i11 cooler with some arctic silver 5 compound

just started building a pc for my grandma (found good prices on these ones) but when i connected everything togather there is no beep or monitor signal (tried with onboard hdmi and dvi and external hdmi and dvi from a gt 630 i have from my old pc).
what is going on? its pretty weird!
all fans spin and when i disconnected the fan from the heatsing after few minutes it got a tiny tiny bit warm (something that i think is reguler) and that power modules heated up a bit too. nothing smells or produces smoke.....
does someone have any idea?

 

[Supahos]

Your processor is only supported after a bios update. Which requires a Skylake cpu to perform. You'd need a b250 chipset to support it natively

 

[elnadav12]

Your processor is only supported after a bios update. Which requires a Skylake cpu to perform. You'd need a b250 chipset to support it natively

hi, got it.
one question. do they write it somewhere?

 

[Supahos]

Usually you can look at the processor support list for the board, and it'll show what bios is required to support it

 

[Supahos]

That board predates that cpu by several months so it needs a update to use it. You can either get s b250 board, buy a skylake Celeron to update the BIOS or take it to a repair shop to let them do it