A Nikkei report said server maker Supermicro Computer had issued the advice in a bid to address American customers' concerns about the risks of cyber spying. Supermicro earns more than 60% of its revenue in America.
The move appears to be driven more by the trade tensions between the US and China. Last year, Supermicro used Chinese-made motherboards in less than half the 1.55 million servers it shipped, compared to more than 90% in 2017, according to Betty Shyu, a server analyst at Taipei-based Digitimes.
The Bloomberg story, published in April last year, claimed that the supply chain manipulation had been done by implanting chips on mainboards made for it by a Chinese supplier.
The Nikkei yarn comes a few days after Supermicro announced that it would expanding its corporate headquarters in San Jose, California, and also breaking ground on a new 800,000-square-foot building in Taiwan.
Supermicro has seen its server sales fall since October last year and has forecast a drop of about 10% in revenue for the January to March quarter, compared to the previous three months.