Add project: philips TV again

content/projects/repair-philips-42pfl6057h-12-again/index.md

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+date = "2020-03-29"
+title = 'Repair: Philips 42" 3D LED TV with Ambilight - AGAIN'
+tags = ["repair", "audiorepair", "philips", "tv"]
+categories = [ "Audio Repair" ]
+summary = 'This week our Philips TV died. I repaired it before, and it seemed the problem was back.'
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+
+About a year ago I [repaired a Philips 42" 3D LED TV](/projects/repair-philips-42pfl6057h-12/). I like
+this 1080p Ambilight TV quite a bit, so I installed it into the living room where it has been in 
+service since February 2019. 
+
+Last week, during a period of self-isolation due to the Cornoavirus wreaking havoc around the world, the
+TV died again. It has the same symptoms as before:
+
+ * Would not turn on
+ * No blinking red LED
+ * Red LED would blink fast on remote control input
+
+The TV is used intensively. Although it's placed in a well ventilated spot, it would not surprise me
+if the Fusion IC had suffered some thermal damage to it's BGA soldering again. 
+
+![Spilled TV Guts](spilled-guts.jpg)
+
+The back of the TV comes of easily enough and the heatsink, which as a bit loose, came of quickly as 
+well. 
+
+![Heat it up](heat-it-up.jpg)
+
+Having learned from my previous repair I used a bit of heat resistant Kapton tape to hold the small
+passives around the IC in place.
+
+Keep in mind that the top of the IC is _designed_ to get rid of heat and you want to heat up the solder
+balls underneath the IC. That means I've set the temperature of my hot air station quite high (400°C) 
+whereas the melting temperature of lead free solder is 217°C. 
+
+After a few minutes of heating up the IC I decided to let it cool back down and tried turning on the
+TV. It worked like a charm again.
+
+## Heatsink solution
+
+The Fusion IC is decked out with a ceramic heatsink on top and a block of heat transferring foam on 
+the bottom between the PCB and the metal chassis. 
+
+The ceramic heatsink is held in place by a small piece thermal adhesive tape. Well, it used to be. After
+my previous repair I placed it back. It didn't hold, so I used some cable ties to keep it in place. I 
+should have know the effect of the thermal tape would be lost. This is like sticking a huge copper cooler
+on a CPU without thermal paste.
+
+Well, I'm all for not making the same mistake twice. 
+
+I bought a piece of 25mm x 20m of thermal adhesive tape from Amazon.de. I removed all residue from the
+old tape and stuck it back on. This should improve thermal conductivity quite a bit.
+
+![Thermal Stuffs](thermal-stuffs.jpg)
+
+After that I put everything back together and we have a working TV again :-) 
+
+![Featured](featured.jpg)

content/projects/repair-philips-42pfl6057h-12/index.md

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 Next, reinstall the back panel and reconnect the Ambilight cable. And I've got a new TV :-) 
 
+**Update 2019-03-29** about a year later the TV failed again. [Read all about it here](/projects/repair-philips-42pfl6057h-12-again/)
+
 ![Working TV](./featured.jpg)