Acer Aspire One D250-1151 RAM Replacement - iFixit Repair Guide
Acer Aspire 5 A515-56-50RS, 15.6" Full HD IPS Display, 11th Gen Intel Core i5-1135G7, Intel Iris Xe Graphics, 8GB DDR4, 256GB NVMe SSD, WiFi 6, Fingerprint Reader, Backlit Keyboard
NX.V9MAA.006;TMP256-M-51Q1 | Acer TravelMate P2 TMP256-M-51Q1 15.6 inch Intel Core i5-4210U 1.7GHz/ 4GB DDR3L/ 500GB HDD/ DVD±RW/ USB3.0/ Windows 7 Professional or Windows 8.1 Pro Notebook (Black)
parts-quick 4GB Memory for Acer TravelMate P2 TM 249-M, TM 249-G2-M, TM 249-G3-M Compatible RAM DDR4 2400MHz SODIMM at Amazon.com
Amazon.com : Acer Aspire 5 A515-56-36UT, 15.6" Full HD Display, 11th Gen Intel Core i3-1115G4 Processor, 4GB DDR4, 128GB NVMe SSD, WiFi 6, Windows 11 Home (S Mode) : Electronics
How To Replace Or Upgrade Ram Acer Aspire 5742z - YouTube