Light on PC case won't turn on

Are those LEDs connected properly to a power source? Make sure they haven't gotten disconnected when you installed your components.

Good luck!

for the pwr button led, I connected the led + and - on the front panel connector, the fan led is turned on because the fan is turned on, I don't get why the top thing doesn't light up.

I would think that LED would have an independent power connection from the fan. Have you verified that?

I don't know, I'm a first time builder, I just followed a youtube video.

Look inside that portion of the case. You may have to remove the optical drive. Trace the LED wires to ensure they are properly connected to a power source.

If connected and still not working, disconnect and reverse the polarity (just turn the connector the opposite way) and try again. If the proper pin is not on the positive/negative post, they won't light up.

What power source do I plug it in on. There was this group of wires from the front that I had to connect to the f panel and I connected all of them.

You are looking for the wires that attach to the LED that isn't lighting up properly. Not the front panel connections. BTW, are your power and HDD LEDs working correctly?

The power led works, my dvd drive led works, I don't think the hard drive has leds.

I'm gonna open my computer again when my new video card and heatsink arrives, if I do find an unconnected wire comming from the unlit led, where do I connect that to?

You should have a HDD LED near the power LED. The HDD LED connects at the Front Panel header on your motherboard (the same block of connectors for the power switch, reset switch, power LED, etc). Look at your motherboard manual and look for the front panel connections.

I got all the front panel connectors connected already.