richa_chan

Unbelievably it was the same exact issue, but It took me a while to find it. The voltage checked out so I just randomly started re-soldering the components in that region while the Lynx was on. Soon as the iron touched the top of L21 sound came through. Unfortunately the metallic part on the inductor also fell off immediately. I was able to get the connection to work by putting a large solder blob there but I'd like to replace that if I can find the part I need. Thanks for the help!

So... after replacing all of the caps, diodes D9,10 and 11, and the D13 Zenner I still had the same MOSFET issues. It would not power off. So I decided screw it, removed the power circuitry and did the 5V mod with a lipo battery. Also did McWills's screen upgrade which is amazing! Added a hard on/off switch for now until I can mod the soft on/off. Unfortunately... I lost sound. Sound used to work fine on this. I've double checked all the caps I replaced and the speaker. I do not get sound via the speaker or headphone jack. Does anyone know the specific caps that are used for sound on a Lynx II so I can troubleshoot a bit more effectively? I'm not sure how anything else I replaced could have broken the sound.

Thanks for the info! I won't have time to dig into it this week but I'll update again if I get it working or not. I've been reading on here about the 9v/5v thing, but those schematics are crazy. This is my 2nd Lynx, the other does not display anything at all but the power LED comes on and the power on/off button works. If I can get them back in shape I want to keep one "original" and one with an LCD mod/lipo to actually play on. Fun to show people the difference. Trying to keep these old electronics working is a task!

Hello all, I have an Atari Lynx II that has the opposite problem from what I usually read on here. Whenever it is connected to a power source (wall adapter or batteries) it immediately turns on and never turns off. It will drain batteries completely if I leave them in it. Without a game it just shows the "Insert Game" message. With a game it plays fine, good display, good sound, but the Power and Off buttons do not do anything. I have replaced the D13 Zenner and the Q12 MOSFET and it continues. Happens with or without the flex ribbon for the buttons attached. I guess it is a more fortunate issue then "will not turn on", but has anyone ever run into this or have any ideas? Thanks!