I've found a way to repair my broken H5

first step:

remove the ring that holds the shutter button. rotate anti-clockwise and should pop up freely. may require some sort of persuasion/strong grip

next,

you should see the conductive black membrane with a small pit in the middle where the pin of the shutter button pushes

apply one drop of isopropyl alcohol onto the black membrane, wait 30 sec, apply one more. repeat 2-3 times. it should remove some of the tension/dent from the membrane. gently push the membrane with a non-piercing tool to confirm focus. if so, go to next step

make yourself a small disc of thin but durable plastic, to fit freely on top of the membrane, so the pressure of the pin be spread onto a larger surface. apply a double-sticky scotch tape onto the plastic disc and secure it to the membrane. check again if focus is working.

put all back together. enjoy.


notes: do NOT use acetone as it will destroy the plastics inside

do not use superglue or else to secure the plastic disc

use small amounts of isopropyl , do not spill inside casing


regards,
DeeJay

PS. please excuse some grammar error, english isn't my native tongue.