update: only a few mins earlier,i received another phone call from the technician who is responsible for making the scratches-he said that he had forgotten to take the serial number of the replacement panel the other day and so he'd like to come once again and open up the monitor so that he can find that number,to which I didn't give my consent.I told him that he had already scratched the monitor while replacing the panel and so if he attempts to open it again,he may scratch it even further-then he replied that its absolutely normal" for the back panel to get scratched to some extent while it is being opened and that really annoyed me-i told him straightaway that i won't allow him to open the back panel any more because I couldn't risk getting it scratched once again,then he just hung up without saying anything else.
I wonder what these technicians are upto and what they are planning to do about my monitor-I hope it was not just some kind of ploy to avoid taking responsibility for scratching the monitor.What will i do if he calls me again and insists on opening back panel to determine the serial number?I've no intention of allowing that incompetent technician to do anything to my monitor ever again.