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I'm trying to remove my stock headunit and I'm told that I have to remove the dashboard to get to it. There were four screws (red arrow in picture points to one) that I took out, but I can't pull on it much before it snaps back into place. I'm also afraid of ripping out the clock and emergency flasher wires since they move alone with the dashboard while the headunit stays in place. Will I have to remove the lower part of the dash (blue bracket)? That part seems really hard for a newbie like me

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Headunit problem if anyone has any ideas:
Nothing happens when I push the power button... it's like there's no power going to it. However, when I turn on the interior dashboard lights, the radio buttons do light up so I don't think it's a blown fuse. I haven't tried sticking a casette inside because I'm afraid it'll get stuck, so now I'm just tryina see if I can figure out what's wrong after taking out the unit.