hey everyone... i'm new to the site, but i know my way around a car or two. i'm just not familiar with Nissans, so i'm looking for some help.
I have a used '03 Altima, 2.5S. my girl's car broke on her a couple months ago, so we decided to get a new one. we've been wanting to for a while, but it seemed like this was a good time to finally do it. anyway, we take the car for a drive, everything is great. we get it home, still is fine. she goes to work the next morning, and the radio makes a loud thumping sound come from the speakers

. she brings it home, tells me what's wrong, i try to replicate the situation, nothing happens. i take it out that night, the problem starts happening to me. i also notice "ERR 01" is on the screen flashing

, before it turns back to the radio. it never plays or ejects the CD, justs makes the thumping sound.
i started looking for the cause all over the internet, and just found guys saying that it was pretty much a mechanical problem (gears maybe?) and that the only fixes were to take it to the dealership and get charged ~300-500 bucks, or get an after-market radio.
Question #1: what the #$%& is "ERR 01" supposed to mean? is it a mechanical problem, or is it something that i can fix? i forgot to mention that since the problem has arisen, i have also tried a CD player lense cleaner to no avail.
Question #2; i have not been able to find any free links/pictures/information on how to remove the stock center console in order to replace the stereo head unit... anyone got any ideas/links/pictures/info that i can use?
i would like to get it done in the very near future (going on a road trip in a couple weeks... hopefully in the new Altima), so any information will be helpful.
Thanks!
Later,
Andy