Pi 4B - Does not boot

Hi there,

Bought a Pi 4 . It booted fine until last night.

Now it will not provide a signal to HDMI.

The red light is continuous, but the green one has four short flashes and a longer period before repeating.

I tried on different monitor with no difference - don’t think it is booting.

I bought a preformatted SD card.

Looking forward to the help.

I’m having the exact same issue.
I tried the pre-formated sd card in a pi zero and it worked fine. so the problem doesn’t seem to the sd card.

a pi zero and it worked fine

SD Cards are not transferrable between different Pis (different drivers etc for system on chip)

Bought a Pi 4 . It booted fine until last night.

What power supply is being used? What other devices are plugged into the Pi?

The power supply was bought from yourselves.
There is nothing connected apart from a monitor, keyboard and mouse