Lenovo ThinkPad L440 Wistron LOS 1 DIS UMA 12289 1 Rev 1 Schematic
This page has the schematic for Lenovo ThinkPad L440 Wistron LOS 1 DIS UMA 12289 1 Rev 1, a laptop motherboard from Lenovo. The board itself was engineered by Wistron. Version: dedicated graphics (DIS).
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Questions about this file
How do I use the schematic for diagnosis?
Start with the power-sequence and power-rail pages to find where a no-power or no-image fault begins, then locate the parts with a boardview. No-power troubleshooting plan.
Is the download free?
Yes. The button opens post #6423 in the public Telegram channel @schematicslaptop, where the file can be downloaded with a free Telegram account.