Samsung LS19A100, slowed down, colors changed, lines not very crisp

[panoss]

In the above mentioned monitor, I removed the plug a few times and this resulted no power.
I opened it, soldered the dc jack and worked again.
But since then colors have changed, too bright (or something like this) and lines, eg letter, are not very crisp as they used to be, they are vague, like faded out.
I checked voltages on the main board, they look ok (according to the service manual. It' attached at the bottom):
IC600 (D9329)
pin 1 (BST) 9.6V
pin 2 (VIN) 13.5V
pin 3 (SW(Switching output)) 4.8V
pin 7 (EN)
pin 8 (SS) 2.6V

IC601 (SOZ A53)
Pin 4 5V
pin 5 (looks like 6th but it's the 5th) 3.3V

CN400 pins 1-5 have 4.85V
Q802 13.38V

IC 100
pin 8 4.84V

Am I ok till now???

No, on the other board...
It has an IC named 'IC5' marked with: 170753 tg121 ntdk
Look at the photo.

Didn't find anything in the service manual or in the internet, so I don't know which ic this is.
It outputs:
-on the coil L1, 4.8V
-on the right end of the diode 12.56V

Are they correct?
What else should I check?
Any help is welcome.

[panoss]

Correction: it' s not 170753 BUT 17075E, so I think it's this one.
'Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp'

[CapLeaker]

I read : 17075F
and that is a boost converter. Maxim 17075