HP 9825a

[Geoff Quickfall]

Just uploaded a keyboard test video showing the response the keyboard has since the "wash". This was not just a wash as one would apply to the standard detached keyboards. The caveat here is that the keyboard is the sandwich type similar to many HP keyboards composing of:

1. Keyboard bezel
2. Keys
3. Clear plastic film
4. Insulator
5. Contact components
6. Keyboard PCA
   

The keyboard is a sandwich which has about 100 soldered heat stakes. If the wash did not work I was gong to remove the stakes and deal with the assembled keyboard. If the wash worked, well, excellent. It did work as seen in the video. Prior to the wash I got "error 30" and repeating beeps indicating a stuck function key at start up. The beeping error message looped even after a reset and, as well some keys bounced.

1. Firstly I soaked the keyboard in like warm soapy (liquid dish detergent) water to remove the coffee and possible sugar residue.
2. I used a long fine bristle brush and agitated the keys from the top (obverse) of the keyboard removing any contamination from the top of the clear plastic film.
3. I repeated the agitation to the underside (reverse) working the bristles into the 'pores' on the keyboard. I have used this technique successfully on many heat staked HP families.
4. the soapy wash was followed by many (approx. ten) thorough rinses and immersions in warm water.
5. the keyboard was dried overnight by leaning it gainst a support and allowing the water to 'drain'.
6. comoressed air was blown through the keys and the reverse of the board. At the same time a hair dryer, set to warm, not hot augmented the canned air.
7. the obverse side of the keyboard sat inclined in front of a fan for the next 2 days, the reverse side for another two days. Again augmented with warm air from the hairdryer on occasion.
8. it was then placed in an enclosed box resting on a bed of silica dying pouches with similar pouches covering the top and left for a week. The pouches are 3 inches by 2 inches in cloth sacks and contain silica drying pellets.
9. the board was removed and deoxit gold was introduced to each pore on the reverse, backing each key and injected into the pore via a syringe. This enhances and preserves the contacts.
   

The result as you can see is a fully functional, non bouncy and non sticking keyboard with a perfect feel:

The 'cleaned keyboard'

Ensure video quality is set 720.

Geoff

Edited due to poor typing skills.