The only place I found any IRF230's in stock they are $13.49 a piece, any better sources out there? I need 4 for a Megabass head.

GREAT IDEA!

Determined there is preamp power, problem lies on the microprocessor board. Well, it was worth a try! I was trying to get this going for my cousin, looks like he's due for a new amp or he'll have to take it to a Line 6 dealer to have the board replaced. Oh how I hate these things.

I am trying to repair a DOA Line 6 Spider II 210, amp powers up, I can hear the speakers have power, so the power amp section is working. However, none of the lights are coming on and when I tested the cable connector goint to the preamp board no power was present. Transformer checks out fine, and all resistors on the power supply board are good. Bridge rectifier is conducting one way only like its suppossed too. The only thing I question is the little ST 2N 5401 transistor being good on that board. Anyone have this issue with these amps and what should I be looking for?

Here it is finally had time to record an mp3 of the Sunn Stage Lead. It was early morning so my chops weren't up to speed yet..lol.

http://www.isound.com/mark_hawkins

Took it cautious like you said and now I'm rockin! It started to sound better the more I played it probably the caps getting fully charged. It has really good sound I have to admit I am surprised. Sounded even better with an overdrive pedal. I gave it the run through for about an hour, put the knobs back on and the amp is back in the cabinet. Thanks for all the help in locating the issues Mr Fahey and Loudthud, I learned a lot on this one and gained a ton of knowledge in the process. I'll get a mp3 up soon so you can hear how it sounds!

Sounds good I will give it a try tonight. ST is what I put in there , I have a local electronics shop that is pretty well stocked. Thanks for all of your help, I will let you know how it goes.

Got it figured out, its making great sound now on the limiter, the light bulb gets brighter the louder the amp volume is turned or how hard you play. Haven't plugged it in straight to the outlet yet.

Replaced c123 and r141 was a little out of spec so replaced that too. C1 tested fine. Fired it up on the limiter and had rough sound so I Shut it down and cleaned all the jacks And pots with Deoxit. Sound is still intermittent.

I put in new R140 and R142, also soldered in the 100 ohm resistors in parallel with the 22 ohm ones. Reading a more stable 501mv at Q1 and 489mv at Q2. I haven't tried it yet but will later tonight. Problems only occur once the speaker is plugged in so hopefully its a go this time which makes me wonder about that cap in C1. The local parts guy didn't have that in stick so may have to order one if its the issue.

Light bulb limiter has been on it since I lost a transistor. Good to know MJI5003 will work..thANKS. Did check them with an ohmeter. I didn't get any time to really get at it today, but should get somewhere this weekend.

Well, looks like the driver trans is good, it measured infinite on all secondary leads. I did remove R140 and R142 and both measure around 2.5 ohms = should be .33 ohms. For whatever reason, pins 11 and 14 are at 24V now with the transistors removed. One of the new transistors is bad, and one of the originals was bad too. I have 3 good ones left. I'll get a couple new .33 resistors installed and then take a reading with those 100 ohm resistors installed in parallel with the 22 ohm ones.

A bit more testing I found about 10V at pins 11 and 14 from driver transformer to Q2. Pins 12 and 13 from driver transformer to Q1 is less than a volt. Sounds like the driver transformer is bad to me. Its a model 28-4300

Got everything hooked up and had some sound for about 15 seconds before R137 started smoking again. Pulled transistors back out, one tested bad. Put 2 new ones back in that test good (I didn't test the new ones the first time) with an ohmeter. Replaced R137 although it tested ok, it did get red hot. With it back together I get sound but its really weak like its not the full signal or power. I tried it with another cabinet too, since I only tested the original speakers with a 9 volt, same thing.
Checked R136, 138, 139 all are in spec. I'm not wanting to trust Q106 if thats playing a part in this.

Sounds good. I found the speaker plug with 2 pairs of leads I figured it must have been wired series parallel. Couldn't find a speaker on ebay at the moment so sounds like I'll be sending it out to get reconed. I'll put a mp3 up soon.