Issue with my HP L1955 LCD Flat Panel Monitor

March 20, 2010

I had a big issue with my HP L1955 LCD Flat Panel Monitor (TFT)

While using, the screen would fall away all of a sudden.  It seemed that if it was cooled down, it would work again for a few minutes.

Searching the internet brought some answers. It could be the capacitors or even worse.

First I replaced all the 3 Elite 1000uF 25V capacitors on the board. It is a Benq inverter board with version number 48.L1A02.A00 They could be bulged, although they seemed ok from the looks of it.

I also saw that the solder of the 220V external power connector on the board was broken, so I repaired that too by resoldering the pins. With high hopes I put everything together and crossed my fingers. It looked ok, but that was false hope. After 10 minutes the screen went black again 😦

So time for more investigation. After deep investigation with a magnifier I discovered that the solder of the same pin of each of the 4 inverter transformers was broken. Very hard to see, but there was a crack line.

Resoldered them, and guess what 🙂 the monitor works again

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Memory leak issue on an Ipaq HP 6915 in combination with a Audi A4 carkit

January 11, 2009

I have an issue with my HP Ipaq HW6915 PDA, together with my Audi A4 built in carkit.

After analysing I came to the conclusion that the Ipaq cannot handle the phonebook synchronization towards the carkit.

After connecting the phone to the carkit, it starts to synchronize the contact in your pda with the carkit. Due to what ever reason, the pda starts to consume internal memory, causing the pda to crash after all memory is allocated. This can happen between 5 and 20 minutes…..

The concept however works… because the contacts are available in the carkit.

As far as I can see find on the internet, there are more similar issues with Parrot carkits and Ipaq’s. Some Parrot carkits  have the option to disable the sync of the phonebook. The Audi carkit has not….. 

Does anyone know how to overcome this issue?

Update: I have been in contact with Audi support in Germany. It’s a known isse with HP. The bluetooth driver of the Ipaq has a memory leak.

Geforceerde koeling bouwen in een Ferm Concept 1500 lasapparaat

January 4, 2009

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Bluetooth toggle on an Ipaq HP 6915 with hardware buttons

January 4, 2009

ipaq_hw6915

I had the issue with my Ipaq HP 6915 that I sometimes forgot to put on my bluetooth when I’m in the car. For receiving and making calls in the car, I use a jabra bluetooth handfree set.

The real issue occurs when someone calls you and the phone is not yet connected to the bluetooth carkit, due to the fact that the bluetooth on the phone is not turned on. On the Ipaq you are not able to turn on the bluetooth quickly when a call comes in.

I solved this by downloading a small bluetooth toggle application from http://www.freewarepocketpc.net/ppc-download-bluetooth-toggle.html

Put the downloaded .exe program in \windows\startmenu\applications (via the file explorer)

Via Start, Settings, you are able to connect applications to hardware buttons. I choose to use the button on the left side (that is standard used for starting up the camera).

I’m now able to toggle the bluetooth on and off by pushing that button 🙂

Solved.

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Reason why

January 4, 2009

This is my first post. The reason for me to start blogging is to share knowledge on things that I came across, found out or solved.