E20 Error code.

If you catch the "E20 error" early you might find C49 and C48 are causing the fault, they are light blue 47uf 50v electrolytic capacitors which sit next to the large reservoir capacitor, probably leaky, usually they are slightly discoloured.

Check associated components as I have seen burnt up transistors and resistors when things have gone too far.

Hope you find this useful.