It appears that one of the following cards may have been originally installed in your model;
504593-003 Broadcom 4312 802.11b/g (Demi-2) WLAN adapter - Half-size form factor (Most-of-World) 518436-001 802.11B/G/N WLAN HF MiniCard (Medoc) - Most of World implementation 518437-001 802.11A/B/G/N WLAN HF minicard (MD2020) - Most of World implementation 572520-001 Intel Wi-Fi Link 1000 802.11b/g/n WLAN module
Therefore the 518437-001 Atheros 802.11A/B/G/N WLAN HF minicard (MD2020) should work without issue. Use of other card may not work.
If you have any further questions, please don't hesitate to ask.
Please click the White KUDOS "Thumbs Up" to show your appreciation
***** Please click the "White Kudos" Thumbs Up to say THANKS for helping ***** ***** Please click the "Accept As Solution" on my post, if my help solved your issue ***** ***** This is a user supported forum. I am a volunteer and I don't work for HP *****
HP a1632x - Windows 7, 4GB RAM, AMD Radeon HD 6450 HP p6130y - Windows 7, 8GB RAM, AMD Radeon HD 6450 HP p6320y - Windows 7, 8GB RAM, NVIDIA GT 240 HP p7-1026 - Windows 7, 6GB RAM, AMD Radeon HD 6450 HP p6787c - Windows 7, 8GB RAM, NVIDIA GT 240 HP ENVY x360 m6-w103dx - Windows 10, 8GB RAM, Intel HD 520