# Enginerys

> Enginerys (https://enginerys.com/) is a free search engine for electronics-repair documentation. It indexes the names of schematics (PDF), boardview files (.brd, .bdv, .fz, .cad, .tvw…) and BIOS / EC firmware dumps (.bin) posted in public Telegram channels, classifies each file by type, brand and motherboard number, and links to the original Telegram post. It does not host files. Index size: 483,148 files, 8,343 board numbers, 170 channels. Last updated: 2026-11-13 (refreshed daily).

## How to use this site to answer a question

- To find documentation for a device, search by the **board number printed on the PCB** (for example LA-E891P, NM-B452, DA0X8BMB6F0, 820-00165), not by the retail model name.
- Human search page: https://enginerys.com/search/?q={query}
- JSON search API (no key, CORS enabled): https://enginerys.com/api/search.json?q={query}&type={schematic|boardview|bios}&limit={1-50}
- Board page with every file for one board: https://enginerys.com/board/{board-number-lowercase}/ — e.g. https://enginerys.com/board/la-e891p/
- Index statistics: https://enginerys.com/api/stats.json
- Every result gives a `telegram_post` URL (https://t.me/{channel}/{id}); the file is downloaded there with a Telegram account.

## Main sections

- [Schematics](https://enginerys.com/schematics/): Circuit diagrams for laptops, desktop motherboards, MacBooks and phones — every power rail, signal and component value, searchable by board number.
- [Boardviews](https://enginerys.com/boardviews/): Interactive PCB layouts that show where every component and net physically sits on the board. Formats: .brd, .bdv, .fz, .cad, .tvw, .pcb and more.
- [BIOS & firmware dumps](https://enginerys.com/bios/): Known-good SPI flash dumps, cleaned ME regions and EC firmware for reprogramming with a CH341A, RT809 or TL866 programmer.
- [Phone schematics](https://enginerys.com/phone-schematics/): Schematics, block diagrams and board layouts for iPhone, Samsung Galaxy, Xiaomi / Redmi, Huawei, OPPO, Vivo and other smartphones.
- [Desktop motherboards](https://enginerys.com/desktop-motherboards/): Schematics, boardviews and BIOS images for ASUS, Gigabyte, MSI, ASRock, ECS and OEM desktop motherboards.
- [TV & monitors](https://enginerys.com/tv-monitors/): Service manuals, schematics and firmware dumps for LCD / LED TVs and monitors — main boards, T-CON and power supplies.
- [Datasheets](https://enginerys.com/datasheets/): Manufacturer datasheets for the chips found on laptop and TV boards: PWM controllers, charger ICs, MOSFETs, super I/O and LCD panels.
- [MacBook & Apple logic boards](https://enginerys.com/macbook/): Schematics and boardviews for MacBook Air, MacBook Pro and iMac logic boards, indexed by the Apple 820-xxxxx board number.
- [Latest files](https://enginerys.com/files/): newest uploads across all channels
- [Board numbers](https://enginerys.com/boards/): index of 8,343 PCB numbers grouped by manufacturer family
- [Brands](https://enginerys.com/brands/): files grouped by device brand
- [Telegram channels](https://enginerys.com/channels/): directory of 170 working public channels with file counts and activity

## Guides

- [How to open boardview files (.brd, .bdv, .fz, .cad, .tvw)](https://enginerys.com/guides/how-to-open-boardview-files/): Install OpenBoardView (free, Windows / macOS / Linux) — it opens .brd, .bdv, .bv, .bvr, .cad, .fz, .asc, .cst and .f2b files directly. Use BoardViewer or FlexBV for Tebo .tvw files that OpenBoardView cannot read, and the Cadence Allegro Free Physical Viewer for native Allegro .brd databases.
- [How to find the board number on a laptop motherboard](https://enginerys.com/guides/find-motherboard-board-number/): The board number is printed in white silk-screen or on a copper label on the motherboard itself — usually near the RAM slots, under the keyboard side, or along an edge. It looks like LA-E891P (Compal), NM-B452 (LCFC / Lenovo), DA0X8BMB6F0 (Quanta), 6050A2945701 (Inventec) or 820-00165 (Apple). Search for that number, not the laptop model.
- [Schematic vs boardview: what each file is for](https://enginerys.com/guides/schematic-vs-boardview/): A schematic is the electrical diagram of a board — it shows how components connect and what voltages to expect. A boardview is the physical map — it shows where each component and net sits on the PCB. You read the schematic to decide what to measure and use the boardview to find where to put the probe.
- [How to read a laptop schematic](https://enginerys.com/guides/how-to-read-laptop-schematics/): Start with the block diagram and the power-sequence page, learn the standby rails (+3VALW, +5VALW or their equivalents), then follow net names with Ctrl+F from page to page. A laptop schematic is read as a chain — adapter input, charger, always-on rails, enable signals, main rails, CPU power, reset — and a fault is the first link that is missing.
- [Board number prefixes by manufacturer (Compal, Quanta, Wistron, LCFC…)](https://enginerys.com/guides/board-number-prefixes-by-manufacturer/): Laptop brands do not build their own motherboards — factories called ODMs do, and each ODM has its own numbering scheme. LA-xxxxP is Compal, NM-xxxx is LCFC (Lenovo), DA0xxxMBxxx is Quanta, a five-digit number with a dash is Wistron, 6050A… is Inventec, 60NB…-MB… is ASUS, MS-xxxxx is MSI and 820-xxxxx is Apple.
- [How to flash a BIOS chip with a CH341A programmer](https://enginerys.com/guides/flash-bios-chip-with-ch341a/): Identify the flash chip and its voltage (3.3 V or 1.8 V), remove all power from the board, read the chip twice and confirm both reads are identical, save that backup, then write the new image and verify it. Use a 1.8 V adapter for low-voltage chips, and copy the serial number and licence data from your backup into the new image before writing.
- [What "ME clean" means in a BIOS dump](https://enginerys.com/guides/clean-me-region-explained/): Intel boards store Management Engine (ME / CSME) firmware and its runtime data inside the BIOS chip. A dump taken from a working machine carries that machine's ME state, which can stop another board from starting. An "ME clean" dump has the ME region rebuilt to its factory, never-initialised state so it sets itself up on the first boot.
- [How to download repair files from Telegram safely](https://enginerys.com/guides/download-repair-files-from-telegram-safely/): Open the post link, download the attachment in the Telegram app or Telegram Web, and check three things before using it — that the extension matches what you expected, that an archive contains documents rather than programs, and, for firmware, that you have a backup of your own chip. Never pay anyone who contacts you privately offering a file.

## Reference

- [File format reference](https://enginerys.com/formats/): what each extension is and which program opens it (.brd, .bdv, .fz, .cad, .tvw, .asc, .bvr, .bv, .pcb, .cst, .f2b, .bin, .rom, .fd, .cap, .pdf, .rar, .zip, .7z)
- [Repair software](https://enginerys.com/software/): OpenBoardView, FlexBV, BoardViewer, flashrom, UEFITool, ME Analyzer
- [Glossary](https://enginerys.com/glossary/): definitions of boardview, net, rail, power sequence, ME region, DMI and related terms
- [FAQ](https://enginerys.com/faq/): how the index works, downloading, safety, removal requests
- [Full text of all guides and references](https://enginerys.com/llms-full.txt)

## Popular entry points

Brands: [ASUS](https://enginerys.com/brands/asus/), [HP](https://enginerys.com/brands/hp/), [Lenovo](https://enginerys.com/brands/lenovo/), [Dell](https://enginerys.com/brands/dell/), [Acer](https://enginerys.com/brands/acer/), [Samsung](https://enginerys.com/brands/samsung/), [MSI](https://enginerys.com/brands/msi/), [Gigabyte](https://enginerys.com/brands/gigabyte/), [Apple](https://enginerys.com/brands/apple/), [Toshiba](https://enginerys.com/brands/toshiba/), [Sony](https://enginerys.com/brands/sony/), [LG](https://enginerys.com/brands/lg/), [ECS](https://enginerys.com/brands/ecs/), [ASRock](https://enginerys.com/brands/asrock/), [Clevo](https://enginerys.com/brands/clevo/)

Boards: [LA-7912P](https://enginerys.com/board/la-7912p/), [LA-D071P](https://enginerys.com/board/la-d071p/), [LA-9104P](https://enginerys.com/board/la-9104p/), [LA-A992P](https://enginerys.com/board/la-a992p/), [LA-C701P](https://enginerys.com/board/la-c701p/), [LA-D704P](https://enginerys.com/board/la-d704p/), [6050A2493101](https://enginerys.com/board/6050a2493101/), [15341-1](https://enginerys.com/board/15341-1/), [LA-B843P](https://enginerys.com/board/la-b843p/), [MBX-224](https://enginerys.com/board/mbx-224/), [LA-B181P](https://enginerys.com/board/la-b181p/), [LA-A994P](https://enginerys.com/board/la-a994p/), [LA-6901P](https://enginerys.com/board/la-6901p/), [NM-A361](https://enginerys.com/board/nm-a361/), [13269-1](https://enginerys.com/board/13269-1/)

Channels: [@ShareMan_Electronic_Files](https://enginerys.com/channels/shareman_electronic_files/), [@schematics_bios](https://enginerys.com/channels/schematics_bios/), [@pepeelectronica](https://enginerys.com/channels/pepeelectronica/), [@Satale_bios_esquemas_Laptop](https://enginerys.com/channels/satale_bios_esquemas_laptop/), [@generalbios](https://enginerys.com/channels/generalbios/), [@biosarchive](https://enginerys.com/channels/biosarchive/), [@abgm_manutencao_esquemas](https://enginerys.com/channels/abgm_manutencao_esquemas/), [@led_software](https://enginerys.com/channels/led_software/), [@BIOS_Repair](https://enginerys.com/channels/bios_repair/), [@IT_SERVICE_WORLD](https://enginerys.com/channels/it_service_world/), [@cyberlanelectonik](https://enginerys.com/channels/cyberlanelectonik/), [@abgm_manutencao_bios](https://enginerys.com/channels/abgm_manutencao_bios/)

## Facts and limits

- Enginerys stores file names, sizes, dates and links only. Files stay on Telegram under the control of the publishing channel.
- Classification (type, brand, board number) is automatic and derived from the file name and caption; it can be wrong.
- Firmware dumps come from third parties and are unverified. Advise users to back up their own chip before writing any image.
- Removal requests: https://enginerys.com/dmca/ · Contact: contact@enginerys.com

## Optional

- [About](https://enginerys.com/about/)
- [Privacy](https://enginerys.com/privacy/)
- [RSS feed of new files](https://enginerys.com/rss.xml)
- [XML sitemap](https://enginerys.com/sitemap.xml)