Pilot tries to light but no flame on Lochinvar hot water boiler

Hi all, I have an 8 year old Lochinvar hot water boiler and it can't light a flame to warm the water. My pilot light comes on, tries to ignite the gas (I hear a buzzing sound), but won't. There is a Honeywell device on the control panel on the front. After the boiler tries to light, the green light blinks 8 times (the code for this says 24V). Does that mean I need a new thermocouple or is this controller malfunctioning and need a new one of these control devices? I'd like to be a little educated before calling someone out. The boiler was working fine until a couple of weeks ago.

thanks in advance for your help.

I attached a picture of the Honeywell control box.