# Backlight Sheet HP L77991-005

**URL:** https://aio.lv/en/product--hp-l77991-005--4287955
**Data updated:** 2026-01-12 19:30 (EET)
**Category:** Other Repair Parts
**Manufacturer:** HP
**Manufacturer code:** L77991-005
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 38.99 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 32.22 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hp-l77991-005--4287955

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.08.2026 | free |
| Pickup points | 12.08.2026 | 1.89 EUR |
| Courier delivery to door | 12.08.2026 | 4.99 EUR |

## Summary description

The HP L77991-005 Backlight Sheet is designed for HP laptops, ensuring optimal display brightness and clarity. This high-quality replacement part enhances your laptop's visual performance, providing even illumination across the screen. Easy to install, it is compatible with various HP models, making it a reliable choice for restoring your device's display functionality.

## Long description

The HP L77991-005 Backlight Sheet is a replacement component designed to restore or improve the display illumination in compatible HP laptops. Manufactured to fit specified models, this backlight sheet provides uniform light diffusion behind the LCD panel, contributing to consistent brightness and improved screen visibility. The part is identified by HP part number L77991-005 and is intended for use in service or repair situations where the original backlight sheet is damaged, worn, or producing uneven lighting.
Advantages
This backlight sheet delivers even light distribution across the display surface, helping to reduce hot spots and dark areas. As an original-equivalent HP part (MPN L77991-005), it is engineered to match the physical dimensions and optical characteristics required by compatible HP laptop panels. The component is lightweight, thin, and compatible with standard installation procedures for laptop LCD assemblies, enabling straightforward replacement during screen servicing.
Suitable for
Repairing laptop screens with uneven or dim backlighting
Replacing damaged or torn backlight diffusion layers in HP laptops
Refurbishing laptops to restore display brightness and uniformity
Use by repair technicians and authorized service centers handling HP devices
Key specifications
Brand: HP
Manufacturer part number (MPN): L77991-005
Type: Backlight diffusion sheet for laptop LCD
Compatibility: Designed for specific HP laptop models (check model fitment before purchase)
Form factor: Thin, lightweight sheet intended for internal display assembly
How to use
To replace the backlight sheet, first power down the laptop, disconnect the battery, and follow the device-specific disassembly procedure to access the LCD panel. Remove the bezel and unscrew the LCD frame, then separate the LCD layers gently to access the internal diffusion sheets. Remove the damaged backlight sheet and install the HP L77991-005 in the same orientation, ensuring alignment with screw holes and connector passages. Reassemble the LCD panel and laptop in reverse order, reconnect the battery, and test the display for even illumination before finalizing the assembly.
Usage recommendations
Use static-safe handling and appropriate tools when servicing the LCD assembly. Verify model compatibility with HP part number L77991-005 before purchase. If unsure about disassembly procedures, consult a professional technician or an authorized HP service center to avoid damage to the screen or internal components.

## Specifications

| Feature | Value |
|---|---|
| Type | Backlight Sheet |
| Number of battery cells | 3 |
| Brand compatibility | HP |
| Battery capacity | 56 Wh |
| Quantity per pack | 1 pc(s) |
| Harmonized System (HS) code | 84732990 |

## FAQ

### How much does the Backlight Sheet L77991-005 cost, and is it available for purchase?

The price is 38.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 386 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 07.08.2026 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 HP 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 HP 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

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