High HDMI port failure on Playstation 4 gaming consoles now is a well developed and known issue. Poor design of the port leaves users stranded if port is damaged and the only solution is to replace the whole part. There has been few different aftermarket designs floating in various markets, however during our extensive experience and after rigorously testing our engineering department managed to find a suitable replacement with higher structural strength. In most occasions the issue of faulty HDMI port can be visually identified by just looking inside the port at back of the console.
Faulty HDMI issue isn’t the only fault motherboard fault PS4 console experiences. We have been reballing APU ASICs and replacing various components on the board to get these consumer devices back into working order. One of the most common issues is HDMI transmitter MN86471A failure, which is caused by shorting certain output pins of HDMI port. This results in no video output even after APU BGA rework and port replacement. Faulty MN86471A can also produce problems such as low resolution, video only in system menu and video output of only certain resolution range, such as 480p. Package is very sensitive to Electrostatic Discharge (ESD) damage and if handled improperly will become faulty with various issues or non-operational at all.
HDMI v1.4b MN86471A Transmitter Controller
The part itself if 64pin LQFP package manufactured by Panasonic, which is defined as High-Definition Multimedia Interface (HDMI®) transmitter. The digital video interface contains an HDMI v.1.4b compatible transmitter and supports all HDTV formats. Internal HDCP keys allow the secure transmission of protected content as specified by the HDCP protocol. It is not available freely in the market and was probably manufactured as ASIC by an order from Sony. Most common way of sourcing the part is purchasing it board pulls, however considering our experience these vary with 30-40% failure rates and current way to test the integrated circuit is to solder it in place.
Due to high demand of MN86471A Transmitter Controller engineering department decided to develop a solution, which would allow us to test these controllers in native environment. This led to researching and installing solderable LQFP foot with special headers and mount burn-in socket on top. The procedure involved sourcing the correct socket, which will allow minimal bandwidth degradation and would allow to easily insert the component without soldering it in place. The socket was a great success and allowed us to purchase cheapest possible components on the market and test them to raise issues with suppliers about non-functional units. This strategy allowed TFix to shave valuable operational time when replacing MN86471A integrated circuits and further improve Playstation 4 game console success rates. LQFP socket was expensive however this proved to be successful investment into further extracting value from recyclable electronics. All our stock of MN86471A has been re-evaluated and all non-working items removed leaving only fully functional components.