![Dell U8679 OptiPlex 745 755 GX620 SX280 USFF DCTR 12VDC 0.43A 4-wire Fan | Sunon | Fans | Team Spares Dell U8679 OptiPlex 745 755 GX620 SX280 USFF DCTR 12VDC 0.43A 4-wire Fan | Sunon | Fans | Team Spares](https://images.esellerpro.com/3459/I/954/8/2006-01-02%2006.32.01.jpg)
Dell U8679 OptiPlex 745 755 GX620 SX280 USFF DCTR 12VDC 0.43A 4-wire Fan | Sunon | Fans | Team Spares
![bought second hand motherboard, Several start up alerts, previous fan failure, rear fan failure, power button cable failure (even tho the power button works), front I/0 cable failure. : r/techsupport bought second hand motherboard, Several start up alerts, previous fan failure, rear fan failure, power button cable failure (even tho the power button works), front I/0 cable failure. : r/techsupport](https://external-preview.redd.it/K9AdcfXF0BvemF8TpTuN-JuHB_kzEhXmAgTF1VLmE6s.jpg?auto=webp&s=c0664ccf0016c047f23859e09cad0100e8569ea9)
bought second hand motherboard, Several start up alerts, previous fan failure, rear fan failure, power button cable failure (even tho the power button works), front I/0 cable failure. : r/techsupport
![CompTIA A+ Cert Guide: Power Supplies and System Cooling | Foundation Topics | Pearson IT Certification CompTIA A+ Cert Guide: Power Supplies and System Cooling | Foundation Topics | Pearson IT Certification](https://www.pearsonitcertification.com/content/images/chap4_9780789749802/elementLinks/04fig10_alt.jpg)