Lenovo G505S parts

From DP

The motherboards inside the various sub-models of Lenovo G505S - as well as their small daughterboards - have been developed by Compal and manufactured by Palwonn and Hannstar PCB providers (according to the board markings). Here are the schematics - https://github.com/g505s-opensource-researcher/g505s-proprietary/tree/master/docs_datasheets

Lenovo G505S, depending on a model variation, may have one of the following motherboards:

1) iGPU only ("HD 8650G" in A10-5750M case) - LA-A092P motherboard

2) iGPU + dGPU (discrete GPU) "HD 8570M" - LA-A091P motherboard (usually rev 1.0)

3) iGPU + dGPU "R5 M230" - LA-A091P motherboard (usually rev 1A)

NOTE : to replace the LA-A092P motherboard with LA-A091P you will also need a heatsink with two radiators (one for CPU and one for dGPU) and they are hard to find separately, although you may try.

Also, any Lenovo G505S motherboards always has the following daugtherboards attached to it:

LS-9901P - one USB port + audio + card reader

LS-9902P - double buttons board which is possible to make by yourself

LS-9903P - double LEDs board

LS-9904P - SATA DVD connector board

NOTE : put the Atheros AR9462 MiniPCIe WiFi module inside G505S - because it's one of the best WiFi chips of ath9k / ath9k_htc family which works on 100% opensource drivers & firmware.

NOTE : the best possible RAM upgrades for G505S are 16GB of 1600MHz CL9 (9-9-9-24 or 9-9-9-27 CAS latency timings, less is better) by two 8GB DDR3 SO-DIMM sticks. Although 32GB is possible with two 16GB sticks and works with coreboot, these are expensive/rare and aren't as fast - can't find any 16GB 1600MHz CL9 SO-DIMMs.