Lenovo System Board LBL Intel UHD Graphics for IdeaCentre AIO 3 (5B21A12900)

When an all-in-one desktop fails to power on or crashes under load, the motherboard is often the culprit. This Lenovo system board restores full functionality to compatible IdeaCentre AIO 3 models, replacing a faulty board with a genuine part built for reliable daily use.

Who is it for

This board suits IT technicians, repair shops, and advanced DIY users who need to bring a Lenovo IdeaCentre AIO 3 back to life. It is ideal for machines that suffer from no display, random shutdowns, or failed onboard components.

Main features

• Integrated Intel Core i5-10400T processor with 6 cores and 12 threads, clocked up to 3.6 GHz
• Intel UHD Graphics 630 for crisp visuals on the AIO display
• Two DDR4 SO-DIMM slots supporting up to 64 GB of memory at 2933 MHz
• Dual storage options: one M.2 2280 PCIe NVMe slot and one SATA 6Gb/s port
• Gigabit Ethernet, Wi-Fi 5, and Bluetooth 5.0 for flexible connectivity
• Rear I/O includes two USB 3.2 Gen 1 Type-A, two USB 2.0 Type-A, and one HDMI-out

Specifications

• Processor: Intel Core i5-10400T (soldered, 6C/12T, 2.0–3.6 GHz)
• Graphics: Intel UHD Graphics 630
• Memory: 2x DDR4 SO-DIMM, max 64 GB, up to 2933 MHz
• Storage: 1x M.2 2280 PCIe Gen3 x4 NVMe, 1x SATA 6Gb/s
• Network: Gigabit Ethernet, Wi-Fi 5 (802.11ac), Bluetooth 5.0
• Rear ports: 2x USB 3.2 Gen 1 Type-A, 2x USB 2.0 Type-A, 1x HDMI-out
• Audio: High Definition Audio
• Compatible with: Lenovo IdeaCentre AIO 3-24IMB05, IdeaCentre AIO 3-27IMB05, and similar

Tips

Before installation, back up data and discharge static electricity. Verify that your AIO model matches the compatible list, and consider replacing thermal paste on the CPU for optimal cooling. Test all ports and wireless functions after assembly.