No image on monitor

Hey guys I am a new pc builder, and I just put a old pc in a new kabinet, so that its look cool. It worked fine but then I wanna put led light in my kabinet, then I pluggede it in jbat1 (*****) and no it doesnt work, it says no signal on monitor. Did I mess my pc op?

Motherboard:ms-7748
Onboard grafik:radeon 6550d HD
Processor: amd a8-3850 apu with radeon hd graphics
350 watt suply
 
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