My jap mega cd 2 has apperently never been used but its dead. Help

[rumpelstiltzkin]

Hi i bought a brand new boxed jap mega cd a few months ago and i never tried it until today and to my horror its dead. The power light does not light up and i do have it plugged in correctly so does any one know anything about fixing them i noticed a saturn sized battery when i opened it up but it looks dodgy to remove.  Help i feel noobed out

[Silver]

Never used a megaCD, but if there is no power light I can't imagine a dead battery is at fault.

Not sure if it uses an external "power brick" power supply or the unit is simply plugged into the mains, but if there is an external PSU (like a laptop) then make sure that is outputting the correct power. Most Sega stuff of that era ran off "9V/10V, 1.2Amps, negative tip."

Are you using the correct Sega PSU? If not, does your psu match the sega one? Make sure you check the polarity (negative tip).

[rumpelstiltzkin]

Yes i am using an official sega psu that comes from a pal megadrive 1 as the megadrive 1 and megacd use the same adaptor. 10v 1.2.     Do you know if consoles that die like this can be fixed i mean surely it couldn't b all over for it if its "never" been used.

[Silver]

Assuming you have 2 seperate power supplys in operation (both the mega cd and the megadrive need them), then the most likely thing is one of the internal fuses has gone in the MegaCD.

I believe this was quite common. It should also be quite easy to fix with some basic soldering ability.

There is a fuse labelled "F1" near the power supply.

On the webpage (with pics) its labelled "F301" - though this might be a different fuse.

http://www.mrvfone.com.au/sega/fuse.htm

You can test the fuses by connecting a multimeter across them - there should be continuity (i.e. the fuse should act just like a peice of wire if it is working). If its broken (likely) you can either replace the fuse or simply just solder a peice of wire across. The latter is easier and faster but removes a level of protection from your MegaCD.

[rumpelstiltzkin]

Thanks for the info silver your a legend but i dont really understand what you mean when you said that i could just simply solder a wire across.

[northerngames]

he means use the wire to bypass the fuse all in all I believe but if you do that and there is another issue leading to that then it will fry the next thing down the line and that is why the fuse was there in the first place.

[Silver]

Basically I meant that if you have a hard time finding a replacement fuse, you can simply use any piece of wire instead of the fuse. The fuse is not required for operation - its a safety feature. I have 2 old Snes' which had internal fuses blown, and I simply replaced the fuse with a peice of wire and 5 years later they both still work fine.

[Loki]

It's still risky I guess... That fuse isn't there for nothing.
I have a load of different fuses here and never had problems getting the right one for any device if one broke. Or is it that different in the mega cd?

[rumpelstiltzkin]

Yes i see what you mean now its like when a fuse blew in my shaver plug a while back my dad just rapped tinfoil around it and its been working fine ever since. Thanks for the replys guys i will try anything to get it working but i will go for the safe fuse option first.    The other thing is what if its not the fuse what else could it  be.

[Silver]

From what i've heard the odds are good it is the fuse, as its the most common fault. I would not worry too much beyond that.

If its not the fuse, your next step would be using a multimeter to test out various points to see if power is getting around the board, checking for any shorts/breaks. Its not easy to go beyond the obvious checks here unless you have a service manual.


Anyway, one step at a time....