Won't play cds or dvds

Try cleaning disc. Despite what we are told, a speck will cause problem. Then if you have use cleaner on drive, just to make sure electronics are clean

Hi, An HO# display is an indication of an internal problem, HO2 - possibly optical pickup. For certain reasons, I would strongly suggest that you bring your unit to a qualified service professional or an authorized center. If you have your own reason(s) of venturing to trying to fix it yourself, a couple of tricks you can try (should you be feeling adventurous and gamble on loosing it all together): 1. If it is an electronic problem, do a service reset; with no disc & tray closed power on, simultaneously press play, pause and back buttons (5 seconds). Unit should reset indicated by blinking of display. If this does not work, try with the power off, press the 3 button then power on; or 2. If it is a mechanical problem, gently shake the unit to and fro. The idea is to partially dislodge the eye from its position, it might have been stuck. Opening the unit will also serve the same since you can do visual inspection. Look for any foreign object along the rail (sliding bar) or any possible obstruction to the operation of the mechanism inside. If none works, you're back to the first suggestion. Hope this works out for you and give you some ideas. Pls post again how things turn up and/or if you need more information. Good luck and kind regards.

Try buying a DVD cleaner disc at Radio Shack or Walmart
See if that helps.
You may have some dust on the laser lens

Could be the laser not being able to read the discs or the graphics chip developing a fault. Make sure your discs are clean.
If it is the laser having problems reading the discs, you can put your ear to the console and hear it skipping and struggling to read the disc.
If the disc isn't struggling to read, it will be the graphics chip freezing because of bad solder joints.

Best companies for diagnosing and repair of this solution are:
http://www.playbackups.com or http://www.repairmanchester.co.uk

Is your disc original!!!
If don't, you have to change it to original, because PS2 ( with no Mod-Chip) can't read copy disc.

It's different if you install a Mod-Chip on the PS 2 Board, it's not a big problem.

If your disc is original and still won't play, then possibly the disc it self or the PS 2 lens already dirty, try cleaning it both........

shut it down and restart it. It has to do with the settings. Did You configure it when You first hooked it up?

POSSIBLE solution

I had this problem a while ago comes up with that code then NO PLAY there are 5little discs inside that seperate the discs when theyre inserted these had come loose somehow I simply restacked them on the spindle, however they MUST go in a certain order or H02 will still appear, mine had numbers on them (but NOT consecutive) I just stacked em in ascending order. It worked great after that.
HOWEVER Ive just had the same problem again but the discs arent loose this time.

I had the same Problem, player was only 13months old when the error HO2 appeared (typical huh?) anyway 2 years of this thing getting shifted from cupboard,wardrobe,attic, (did'n't want to throw it out cause it cost me £700), finally it came to fix it or bin it time. scoured the net to no avail, lost the rag and half dismantled it..then during all of this ( oops I'm going on a bit LOL)
you can hear a sound as though the disc is trying to be read, after 100's of attempts to get it to work, I finally noticed the disc had not changed position. (disc was not spinning) pointed to the Motor??
what I did to fix this was unplug from main's, remove top cover until you can see the top of the dvd disc, got hold of a pencil with a rubber on one end, plug back in, switch power on, and gently pushed top of disc ( clockwise ) and it kick started it off

that was over 3 years ago and the player is still going strong
I know its a bit rough, but nothing ventured nothing gained ;)

You may be better off getting a new system rather than having it fixed. Your problem is in the head itself unless the head pick up that there is a CD or DVD in the tray it won't even spin. Since the systems are constantly coming down in price it is cheaper to buy than to fix.

Format unsupported simply means the unit can not read the disc. The problem is either the disc or the player.

Contact Bose technical support if you are sure the discs are good. 800-367-4008