# Monitor Interface Board for Dell S3221QS — Replacement Mainboard (MPN W125974095)

**URL:** https://aio.lv/en/product--dell-w125974095--12102318
**Data updated:** 2026-03-17 20:27 (EET)
**Category:** Printer & Copier Parts
**Manufacturer:** Dell
**Manufacturer code:** W125974095
**EAN:** 5704174521297
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 92.99 €
**Prices and availability valid until:** 2026-07-31 23:59
**Price without VAT (21%):** 76.85 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dell-w125974095--12102318

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.07.2026 | free |
| Pickup points | 27.07.2026 | 1.89 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

Replacement interface board designed for Dell S3221QS monitor (MPN W125974095, EAN 5704174521297). This mainboard handles input connections and internal signal routing for the specified 31.5-inch model. Use it to repair or restore display connectivity and control functions in compatible Dell S3221QS units, replacing a faulty or damaged interface module.

## Long description

Replacement interface board designed for the Dell S3221QS 31.5-inch monitor. This mainboard manages external video inputs, on-screen control signals and internal signal routing for the specified model. It is intended as a direct replacement for a faulty or damaged interface module and restores connectivity and control functions when installed into a compatible S3221QS chassis.
Advantages
The board provides original-equivalent input handling and signal routing to maintain display functionality and on-screen control responsiveness. Using a compatible replacement mainboard reduces the need for full monitor replacement and can extend the working life of the S3221QS by restoring HDMI/DisplayPort input switching and control interface behavior. The module is designed to fit the specified model’s mechanical layout and connector locations, facilitating direct installation when used with correct mounting and cabling.
Suitable for
Repairing Dell S3221QS monitors with no video signal or intermittent input detection
Replacing damaged or non-responsive control/interface modules in S3221QS units
Restoring HDMI/DisplayPort input switching and on-screen menu control functions
Service centers performing component-level repairs on the S3221QS model
Key specifications
Function: Interface/mainboard for video input selection and control signal processing
Compatibility: Designed for the 31.5-inch Dell S3221QS model
Connections: Handles monitor input ports and internal signal connectors (HDMI/DisplayPort routing and control header interfaces)
Form factor: Replacement mainboard matching original mounting and connector positions for direct fitment
Purpose: Restores input detection, on-screen display control and internal communication between input ports and display electronics
How to use
Power off the monitor and disconnect all cables before beginning. Open the monitor housing following the manufacturer’s service procedures to access the existing interface board. Note connector orientations and cable routing, then carefully disconnect input cables, control ribbons and mounting screws. Fit the replacement board into the original position, reconnect all cables ensuring secure seating, and reassemble the housing. After reassembly, reconnect power and video sources and verify input switching and on-screen controls operate correctly. If uncertain, consult service documentation or a qualified technician.
Usage recommendations
Use appropriate electrostatic discharge precautions when handling the board. Verify compatibility with the S3221QS before installation and test functions immediately after replacement to confirm restored connectivity and control operation.

## FAQ

### How much does the Interface Board Dell S3221QS (MPN W125974095) cost, and is it available for purchase?

The price is 92.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 22.07.2026 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, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Interface Board Dell S3221QS (MPN W125974095) be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Dell 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 Dell 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/12102318/67634035_large.webp