If your PC fan is running very loud or not functioning then a replacement may be needed.

The fan uses an integrated flex cable to connect to the mainboard. The cable connects via 4-pin connector making it a plug and play replacement module, NO soldering is required.

Specifications:
Direct Current: DC 5V/0.5A
Color : Black
Connection: 4-pin 4-wire, Plug-in
Status : Brand New and Original

Reference list of compatible with Lenovo Laptop Models:
IdeaPad L340-15 series:
- - L340-15API (81LW, 81LW, 81LX)
- - L340-15IWL (81LG, 81LH)
IdeaPad L340-17 series:
- - L340-17API (81LY)
- - L340-17IWL (81M0)
V340-17IWL (81RG)
V155-15API (81V5)
IdeaPad 310-15 series:
- - 310-15IKB(80TV00WKUS)
- - 310-15ABR(80ST005XUS)
510-15IKB (80SV)

Compatible Part Number (s):
DFS531005PL0T FLAR, DC28000E0F0, 5F10L35775, 5F10S13874, DC28000E0V0AVC1

What's in the Box
1x CPU Cooling Fan