# Keyboard ASUS 90NB0RL4-R31UI0 US English Backlit

**URL:** https://aio.lv/en/product--asus-90nb0rl4-r31ui0--11391473
**Data updated:** 2026-01-14 13:13 (EET)
**Category:** Replacement Keyboards
**Manufacturer:** Asus
**Manufacturer code:** 90NB0RL4-R31UI0
**EAN:** 5715063761229
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 64.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 53.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-90nb0rl4-r31ui0--11391473

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The ASUS 90NB0RL4-R31UI0 is a high-quality keyboard designed for ASUS notebooks. It features a US English layout and backlighting for enhanced visibility in low-light conditions. This keyboard is compatible with the X Series X421EA and X421EQ models, ensuring a perfect fit and functionality for your device.

## Long description

The ASUS 90NB0RL4-R31UI0 US English Backlit keyboard is a replacement keyboard manufactured for compatible ASUS X Series notebooks. It provides a standard US layout with integrated backlighting to improve key visibility in dim environments. The design matches the original keyboard form factor and key arrangement used in the X421EA and X421EQ models to ensure correct alignment and reliable operation when installed.
Advantages
This backlit keyboard restores full typing functionality with a familiar US English layout, enabling clearer input and reduced typing errors. The integrated backlight permits work in low-light or dark conditions without external light sources. The keyboard is built to fit the original device cutouts and mounting points, supporting consistent tactile feedback and maintaining existing keyboard shortcuts and function key behavior.
Suitable for
 Replacing a damaged or non-functional keyboard in compatible ASUS X Series laptops
 Upgrading a non-backlit keyboard to a backlit US English layout
 Repair services and laptop refurbishment for X421EA and X421EQ models
Key specifications
 Layout: US English full keyboard layout
 Illumination: Integrated backlight for low-light visibility
 Compatibility: Designed for ASUS X Series laptops with matching mounting pattern and connector type
 Connection type: Internal ribbon cable connector (matches original laptop interface)
 Form factor: Low-profile laptop keyboard with standard key spacing
How to use
Power down the laptop and disconnect any power sources before replacing the keyboard. Remove the bottom cover and any components obstructing access to the keyboard area according to the device service manual. Disconnect the original keyboard ribbon cable from the motherboard and remove mounting screws or clips. Align the replacement keyboard into the chassis, secure it with the original screws or clips, and reconnect the ribbon cable. Reassemble the laptop, power it on, and verify keyboard and backlight functionality via the operating system and any manufacturer hotkeys.
Usage recommendations
Handle the keyboard and internal ribbon cable with care to avoid bending or creasing the connector. Use a static-free workspace and tools recommended for laptop disassembly. If uncertain about the replacement process, seek assistance from an authorized service provider to ensure correct installation and to preserve warranty conditions.

## Specifications

### Packaging content

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

### Keyboard

| Feature | Value |
|---|---|
| Keyboard language | US English, US International |
| Keyboard backlit | Yes |

### Features

| Feature | Value |
|---|---|
| Type | Keyboard |
| Compatibility | Notebook X Series X421EA
Notebook X Series X421EQ |
| Brand compatibility | Asus |

## FAQ

### How much does the Keyboard ASUS 90NB0RL4-R31UI0 cost, and is it available for purchase?

The price is 64.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Asus products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Asus service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11391473/66207474_large.webp