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I've done the repair on the touchscreen with the circuit pen a few months ago, is this repair more or less difficult than that one? That repair took me almost 2 days to complete, but I got it done. I'm trying to gauge if it is worth entertaining an offer to repair it here at a local shop in Houston for $500. Thoughts?
If you're already familiar/comfortable with taking out the navigation/radio unit, then swapping out this part is relatively simple. There's a fair amount of screws, but that's about it.
The problem you have is not from the touch panel. It's the board with the cable that you are trying to contact Denso. It's the main BGA with heatsink and fan on it. Most of the time, you need to re-ball the BGA and apply new thermal paste and you good to go.
Is the board you are talking about the one that the digitizer plugs into directly behind the display? I’m having the issue where my display is completely black but my audio still works.
Hi guys, I just wanted to confirm the fix for this problem. This also happened to my Lexus IS250, 2006, EU model, the screen started to reboot at random like the guy in the youtube video @Gville350 who started this thread.
Sometimes the nav unit didn't work at all (no lights on buttons and couldn't turn off the A/C .
The fix was to reflow the CPU on the main navigation board board numbered 462651-0012 (2/2).
After that a thermal compound was applied and the navigation unit works as before, without any reboots, freezes or shut-downs.
Hi guys, I just wanted to confirm the fix for this problem. This also happened to my Lexus IS250, 2006, EU model, the screen started to reboot at random like the guy in the youtube video @Gville350 who started this thread.
Sometimes the nav unit didn't work at all (no lights on buttons and couldn't turn off the A/C .
The fix was to reflow the CPU on the main navigation board board numbered 462651-0012 (2/2).
After that a thermal compound was applied and the navigation unit works as before, without any reboots, freezes or shut-downs.
Best regards
Did you happen to take any other photos of this board (PCBA)? Unlike the other PCBA photos pages up, this is a BGA with a heat sink (not shown), but I'd like to see both sides of it if possible.
Thanks!
Hi guys, I just wanted to confirm the fix for this problem. This also happened to my Lexus IS250, 2006, EU model, the screen started to reboot at random like the guy in the youtube video @Gville350 who started this thread.
Sometimes the nav unit didn't work at all (no lights on buttons and couldn't turn off the A/C .
The fix was to reflow the CPU on the main navigation board board numbered 462651-0012 (2/2).
After that a thermal compound was applied and the navigation unit works as before, without any reboots, freezes or shut-downs.
I didn't do it myself. I took it to a guy who fixes electronic boards. Told him the symptoms and he already knew what might the problem be. He used a specialized machine which heats the cpu using lasers. The temp was 256 degrees celsius at which he was able to pull the cpu out. Just to be clear I didn't watch the process, this is what he told me. Since he is a friend of mine he didn't want any money for this, but after a long struggle I was able to leave him 20 euros.
My advice is: Take the radio apart if you can because it will cost you less (there are a lots of videos on youtube). But if you don't feel confident just leave it to the "professionals". Find a guy who fixes electronic boards, tell him the symptoms and give him the board. Don't forget to apply thermal compound on the CPU, again if you aren't sure just leave the car to someone else and tell him all of this. It's worth a try.
There are several systems capable of doing this. Old school was hot air reflow systems that focus the hot air right on the BGA chip. Lasers do this very well and can scan an run a pattern using a galvanometer to rapidly move the beam and equally heat the IC.
Unlike a new PCBA going through a wave solder machine, reflow heats the whole component (IC), the solder ***** and circuit board its being soldered too so it's not DIY at home deal with bong torch or anything like that.
First you heat the IC to remove it. Then again to clean it. Then clean the board of old solder, likely apply a solder mask and new solder to board and IC. Then align IC to PCBA and heat it to flow the solder and make 50 to 150 solder connections all at once... Don't quote me on that, as there are new techniques and technology but that's the basic idea.
IC - integrated circuit
PCBA printed circuit board assembly
PCB printed circuit board
BGA Ball Grid Array, where "ball" is a solder ball that mechanically bonds electrical contacts of the IC to the PCBA.
@Gville350 I have the same issue. I see that you just installed a 08 Navi to get it going. Do you know if other years that will work with 06? Maybe other member would know as well. For example a 09 Navi unit.
10-10-18, 09:34 AM
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