Here's the post
found this after doing a little searching on the net. i found a new one to buy but from how this guy describes it being temperature related narrows it down pretty fricken well. hope this helps....this describes the cure to fix a ford head unit fyi.
Hi I just wanted to post the cure that fixed my radio. The cure came
from someone that e-mailed me directly, so I will not post his name
here. Here is the instructions that I followed. I am an electronics
tech and did not have a problem with the prochedure.
By opening up the radio you will find a narrow display power board
within the left side of the radio (faceplate toward you). This board
has a metal cover soldered to it, with a toroid (wire wound doughnut)
inside on one side, and a bank of surface mount resistors and
capacitors on the bottom side. One end of the board (SCR heat sink)
is screwed to the heat sink at the back of the radio, the board is
secured with 2 metal bend-tabs, and it has a white mini connector on
the other end which connects to the faceplate. Remove the board from
On the bottom of the board look for surface mount components
R1057/C1071/R1058/C1083/R1064. The colder these resistor/capacitor
chipsets get, the brighter the display. I left the car out in the +5
f degree weather and the display worked until it warmed up a little.
That is how I was able to track it down to these temperature sensitive
parts. Freeze-it also helped after I narrowed it down to a few
The fix that worked for me was to re-molten the solder for each end of
these surface mount components. Be very careful if you try this, as a
big soldering iron, or a lot of heat will destroy the components and
board. And don't do this with the radio plugged in. If you're not
comfortable doing this take it to a friend who is. So far this fix
has kept working for a week, I hope it is permanent.
Disclaimers - don't try this without proper training. It may not be
the same problem that mine had. Don't hold me financially liable to
any damage or expenses you may incur. Fix suggestion is not meant to
put anyone's audio repair business out of business, etc,...