Sega Genesis 2 Console "genisys screen" Questions

My sega genisis isn't working on my LCD screen you need a special cable adapter from Genesis to LCD. The genesis cable to lcd tv : High definition HD AV TV LCD cable [PDF] they have videos on Youtube ...

My genisis has no picture! Well I have sound. But no picture. Im using the RF thing. the leads probably need replacing as these often split inside are you sure the your selecting the right setting on ...

i got a sega genisis but it shows a blue screen when i hook it up Well i think that it might be a power supply issue with the machine then.