iFixit - Answers With Device "Synthesizers"

teenage engineering EP–133 K.O. II: The batteries have stopped working to power the device

Fri, 27 Mar 2026 02:36:25 -0700

The batteries have stopped working to power the device. I have tried new batteries but no luck. Power only works through usb.

The product is out of warranty, is there a simple fix?

Korg Electribe SX: Small shield under the output jack PCB fell while disassembling.

Tue, 24 Mar 2026 22:44:33 -0700

Small shield under the output jack PCB fell while disassembling. I am not sure where to place it back exactly? Anyone have a photo showing how to positing this small shield? Thanks in advance.

Teenage Engineering OP-1: Why won't audio come from the right channel of my OP-1?

Tue, 17 Mar 2026 18:42:12 -0700

I have made sure that all the tracks are panned towards the center, but no audio comes from the right channel. If it is plugged into speakers or headphones and panned to the center, audio only comes from the left side. If it is panned to the right no audio come out. I was curious as to if there is something I am missing or if this is a hardware problem that requires repairs/parts. Thanks!

⟐ Commented March 17, 2026 at 18:42 MST

Teenage Engineering OP-1: Cannot get sound from right channel

Tue, 17 Mar 2026 16:19:55 -0700

I tried replacing the connector board and even with the brand new one I cannot get signal in the right headphone speaker. Troubleshot headphones, firmware and did a factory reset. What else should I try?

Teenage Engineering OP-1 field: OP-1 field Faulty Microphone Repair

Thu, 05 Mar 2026 15:15:46 -0700

I've loved my OP-1 field and taken good care of it, but in the last month or so the internal mic went from sounding terrific to only ultra high end and zero body in the sound. Has anyone come up with a guide to replace the mic? Thanks!

⟐ Commented March 05, 2026 at 15:15 MST

Teenage Engineering OP-1 field: Onboard mic problems. On op 1 field

Thu, 05 Mar 2026 15:14:04 -0700

Mic went from being ok to losing its power and even if i talk loudly up front snd close to it u can barely hear it, but the ui reacts the the mic levels when i tap it with my finger so its working but not properly. The unit has been used for 4 months only and its kinda frustrating that the mic went off, the thing hasnt left my desk and i tske care of it very much…bummed out and looking for solutions

⟐ Answered March 05, 2026 at 15:14 MST

Korg Monologue: 3 notes are not working suddenly

Mon, 15 Dec 2025 22:45:40 -0700

Three notes on my Korg monologue are suddenly not working. I've seen other similar repair threads on Korg keyboards where 3 or more keys stop working that are the same distance apart. I don't know the correct terms but I imagine there is a component that these notes - G,B ,D# are all attached to. my electronic skills are limited. I tried cleaning some connections gently with isopropyl so far to no success.

I include images with bad notes circled on red and another photo further up the scale where there appears to be corrosion (green arrow) but would it have an affect on those notes? I could test with a multimeter if I knew what connection I was testing for.

Teenage Engineering OP-Z: The front buttoms pcb (op-z)? Where do I find?

Thu, 27 Nov 2025 06:51:04 -0700

Hello guys, i wish you are all really well!

I have a question, after coming all the way to Brasil with my op-z looking for someone to fix it, which i found just in Berlin for now.

My Op-z is 40% fixed by now (it was problems of dirty inside, humidity, etc) and now, Tom, which fix for SchenidersLaden with his team, told me that i should find some Front Buttoms Pcb for it, to continue the fixing - ‚cause some of them are not working properly, and this bothers me while composing.

Do you guys have some of them - used or new - to sell or give it to me or know where i could find it?

This would help a lot not just my artistic carreer, but my lufe as a whole.

I keep searching from here,

Wishing again all the best for your

Kindly

Pedro Máia

Obs.: By the way, the op-z module and the cables that i got from you are working pretty well! Just the cable of charging the op-z that lost all it‘s skin, so it‘s like crude now, with the silver cables inside appearing - could it be harmful for me?

teenage engineering EP–133 K.O. II: How to replace output jack?

Sun, 02 Nov 2025 16:05:43 -0700

Does anyone know how to replace the output jack? It won't work at all. I opened the unit to have a look and it is extremely small

Teenage Engineering OP-1: The “4” track button is not working

Tue, 30 Sep 2025 12:20:13 -0700

Hey, so the four button on my used OP1 stopped working recently. I noticed it a few weeks ago. But, when I wiggled the button it seemed to work again. But, now it doesn’t work at all. I assume it’s a mechanical issue. Can someone tell me what I can do to fix this button myself?

Thanks,

Jared

KORG Monotron: don`t power on how to fix it

Wed, 30 Jul 2025 10:28:35 -0700

my monotron do not power on testing it with a 3volt AcDc Adapter Could you help ,please-

or have i to throw it away?

⟐ Answer edited July 30, 2025 at 10:28 MST

Teenage Engineering OP-1: Why wont Ifixit stop re-sellers from poaching connector boards

Tue, 24 Jun 2025 16:32:54 -0700

This part is notoriously always sold out.. i have been trying to get this board for 4 years and its BS that they are always poached and resold. last image is the only seller i can find right now for 300 bucks. does Ifixit or teenage engineering care?

Synthesizers: Was working with power adapter

Mon, 26 May 2025 22:58:29 -0700

My Micro KORG synthesizer/vocoder was working with the correct power adapter then the next time I went to use it won't turn on

⟐ Answered May 26, 2025 at 22:58 MST

Teenage Engineering OP-1: When can we expect the op 1 keyboard to be back in stock?

Wed, 23 Apr 2025 16:48:06 -0700

Please i would really like to know when the op 1 keyboard will be back in stock. mine is broken for a few months now and i really miss playing with it. i tried fixing it s connectors but i had no luck :(

⟐ Answered April 23, 2025 at 16:48 MST

Teenage Engineering OP-1: Why does my OP-1 keep restarting

Mon, 17 Mar 2025 03:07:16 -0700

Hey everyone, I have so many issues with my OP-1 it's driving me a bit nutty.

My first issue is the audio is only outputting a signal from the right side. I've checked the sync settings and in the mixer everything is being sent down the middle. I get a tiny output from the left side but it's very quiet and distorted. I have tried multiple cables and the OP-1's output settings too.

My second issue is that my OP-1 will often just turn itself off, go to restart, then crash. Sometimes it will turn back on and other times it won't until I reinstall the firmware. It keeps happening and won't consistently stay on for more than 30 minutes. ⏎

I really want to use my OP-1 for my live show but I can't in this state. Any advice is deeply appreciated! I've replaced the connector board recently (twice!) and the problems still persists. Thanks ⏎

teenage engineering EP–133 K.O. II: How do I figure out what part to replace if it won’t turn on?

Sat, 15 Mar 2025 14:50:26 -0700

I tried connecting my used OP-1 to my new KO II. Both powered by batteries and plugged into my Roland Microcube (battery power as well). Mistook a “phone accessory” cable for my aux cable when I linked the two devices. There was a terrible screeching sound and all the dashboard lights on the KO II lit up before going black and won’t turn back on. I know almost nothing about the insides of electronic devices. Can this be fixed (by me)?

teenage engineering EP–133 K.O. II: Stereo Output Not Working with Right Channel

Thu, 02 Jan 2025 17:47:58 -0700

Im getting no output in the right channel in the stereo field. Ive tried different cords and rebooting to no avail.

Teenage Engineering OP-1: com key pins on UI board?

Wed, 13 Nov 2024 02:05:34 -0700

Hi,

I currently have an op-1 dsp which doesn't turn on and I need to access the recovery menu to upload firmware, but I am missing the keyboard for it and it's currently out of stock.

Would someone be able to tell me which 2 pins on the keyboard flex cable or the ui board ffc connector are used for the com key?

Teenage Engineering OP-1: Replacing USB board didn't work

Tue, 01 Oct 2024 07:54:08 -0700

Hi,

My OP-1 wasn't getting recognized over USB, so after some lengthy research I bought a new connector board replacement but it didn't change anything. My OP-1 will charge and turn on but It won't show up as a drive in any computer that I've tried. PLEASE HELP.

teenage engineering EP–133 K.O. II: Another K.O. II sob story (friggin' knob)

Wed, 11 Sep 2024 16:51:30 -0700

To begin, I've already reached out to TE, and I'm awaiting a reply-- however, I figured I'd post here too, just to see if anyone else has figured out a fix.

My little machine took a bit of a tumble (oops my bad) and I broke the orange adjustment knob. I took it into my boy at my local music shop, and he gave it a good repair attempt, but it was no good. He said he thought he may be able to fix it if I could get a replacement knob component, which is easier said then done.

Like I've mentioned, I've already reached out to TE directly, but I was wondering if anyone had any hot gossip about K.O. II pieces-- any quirkly little freaky bootleggers who could give me a handy. Or whatever. Hopes are low, but Idk I'm feeling lucky, baby.