No!
No they can not they are solder into the motherboard while built
It is often hard to fit an after market motherboard into dell computers, you would have to check the dell website.
The Dell Inspiron 1545 came out in Dec. 20, 2009; Wolfgang.
The Dell Optiplex GX620 SFF uses an F8101/0F8101 type motherboard.
T5600 Motherboard
Unfortuntely, the Dell motherboard form factors are propietary, so you'll have to buy replacement motherboards directly from dell.
The Dell XPS 400 series uses a BTX format motherboard. A BTX motherboard measures approximately 325 by 266 milimeters.
If your warranty is still available for your laptop, you can send it back to Dell for a website. Alternatively, you can buy a new motherboard from Dell's official website.
Power supply or motherboard is bad.
Any that are USB.
by blowing me