When I was in the staying in the US, I have bought tv, monitors, computer case, hard drive, motherboard from them before and had some defective product, but they replaced them with no issue.
If you buy from Newegg SG and the item is defective, you are covered under the International Return Policy. Just make sure you contact them within 15 days or have someone at home open the package to check it out.
Below is what the International Return Policy covers.
International Return Policy
Return for refund within: 15 days
Return for replacement within: 15 days
You can learn more about our return process and guidelines in the Overall Return Guidelines and Additional Return Information sections of this page.
Defective or damaged products that state “This item is covered by Newegg’s International Return Policy” must have an RMA number issued by Newegg within 15 days from the delivery date for this policy to apply. In the event a product is returned that is not defective, the product will either be returned to the customer or the return shipping cost initially covered by Newegg will instead be deducted from the refund amount along with any necessary restocking fee that may apply. To file a return, please contact Newegg customer service via email or live chat.