Got a dead or wobbly key on your Logitech G910? You don’t have to throw it out.
Replacing a Romer-G key switch is a DIY-able repair that can save your keyboard and keep it out of the landfill.
A subscriber from New York City sent in their Logitech G910 Orion Spectrum RGB Mechanical Gaming Keyboard with a loose “A” key cap and a damaged key switch underneath. In this full walkthrough, we test the keyboard, disassemble it, desolder the broken switch, drop in a replacement, clean everything up, and put it all back together. The G910 uses proprietary Romer-G switches (made by Omron), so we’ll cover exactly which replacement to order and where to find one.
Table of Contents
Watch the Full Repair Video
The full repair is documented in the video below. Use the chapter timestamps underneath to jump to any specific step.
📍 Video Chapters
Tools & Parts You’ll Need
Here’s everything used in the repair. Replacement Romer-G switches can be found on eBay. Search for OEM Romer-G switch and look for sellers with good feedback. The other tools are standard electronics repair gear.
22-in-1 kit that covers all the small Torx and Phillips screws on the G910
View on Amazon →
Plastic pry tools protect the keyboard housing during disassembly
View on Amazon →
OEM Omron B3K. Choose linear or tactile. Buy new on Amazon or search eBay for used/pulled switches.
View on Amazon →
Search eBay →
Free browser tool to test every key before and after the repair
Open Keyboard Tester →
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Understanding Romer-G Switches (Which One Do You Need?)
The Logitech G910 uses proprietary Romer-G switches, manufactured by Omron under the B3K series. Different models and production years use different variants, so it’s worth confirming which one you have before ordering a replacement. The Deskthority wiki on Omron B3K switches is an excellent reference.
| Switch Type | Feel | Actuation Force | Common In |
|---|---|---|---|
| Romer-G Tactile | Subtle bump, quiet | 45g | G910, G513, G Pro |
| Romer-G Linear | Smooth, no bump | 45g | G Pro, G513 |
| Omron B3K (Blue) | Tactile + click | 50g | Older G-series models |
Buying a used/pulled Romer-G from eBay is the most cost-effective option. Look for sellers offering 5-packs. Having a few spares on hand is useful.
Step-by-Step: Replacing the Key Switch
Test the Keyboard First
Before you disassemble anything, use a free browser tool like keyboardtester.com to map out exactly which keys are failing. Press every key and make a note of anything that doesn’t register, double-fires, or sticks. This also gives you a “before” baseline to test against after the repair.
Disassemble the Keyboard
Flip the keyboard over and remove all the screws from the bottom. The G910 uses a mix of Phillips and Torx head screws, so a precision multi-bit driver set is essential. Carefully pry apart the housing using plastic non-marring tools to avoid scratching the case. Take photos as you go so reassembly is easier.
The USB cable and any ribbon cables connecting the top panel are easy to forget and can get yanked. Work slowly when separating the two halves.
Desolder the Broken Switch
Locate the broken key switch on the PCB. Each switch has two solder points. Heat each point with your iron while using a solder sucker or desoldering braid to remove the old solder, then wiggle the switch free. Don’t force it. If it’s not budging, heat it a bit more. The G910 PCB is multilayer, so avoid prolonged heat contact.
Clean the PCB and Housing
While everything’s apart, it’s a great opportunity to clean years of dust and debris out of the housing. Use compressed air and a soft brush for the PCB. Isopropyl alcohol (90%+) on a cotton swab works well for sticky residue on the housing plastic.
Solder in the Replacement Switch
Place your replacement Romer-G switch into the PCB holes. It will only fit one way. Apply a small amount of solder to each of the two pins. You’re looking for a smooth, shiny joint the shape of a small volcano. A cold or blobby joint won’t make reliable contact.
Heat the pad and the pin together for 1-2 seconds before applying solder. This ensures the solder flows onto the joint rather than just balling up on the iron.
Reassemble and Test
Reverse the disassembly steps to put the keyboard back together. Once all screws are in, plug it in and run the keyboard tester again to confirm every key works, including the one you just repaired. Pop the key cap back on and you’re done.
Frequently Asked Questions
Can I replace a single Romer-G key switch without replacing the whole keyboard?
Yes, that’s exactly what this guide covers. As long as you can solder, individual switches can be replaced on the G910’s PCB. The trickiest part is sourcing the correct replacement switch.
Where can I buy replacement Romer-G switches?
eBay is currently your best option for used/pulled Romer-G switches. Search “OEM Romer-G switch” or “Omron B3K switch.” Some specialty keyboard shops also stock them. New stock is harder to find since Logitech doesn’t sell them individually.
Do I need soldering experience for this repair?
Basic soldering skills are required. If you’ve never soldered before, we’d recommend practicing on a scrap board first. Each switch only has two pins, but the PCB is multilayer, so too much heat can cause damage.
What’s the difference between Romer-G Tactile and Romer-G Linear?
Romer-G Tactile gives you a slight bump when the key actuates, which helps with typing feedback. Romer-G Linear is smooth all the way through with no bump, which some gamers prefer for faster keypresses. Both have the same 45g actuation force.
Helpful Resources
💬 r/MechanicalKeyboards: community, guides, and inspiration
📖 Deskthority Wiki: Omron B3K / Romer-G switch details
🛒 eBay: find replacement Romer-G switches
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