In the case can not happen to ask whether you have power surges in the network. Your behavior must be firm and consistent – he is broken, even if you knocked on devaysu hammered, it was boiled in a kettle and charges directly from 220 volts. If you find a very dishonest servismen and detects "cracks on the board," the traces of moisture, "traces of unauthorized repair", ie that you can not reliably refute – become quarreler. Should act decisively: to threaten to complain wherever you can, write down phone numbers, defiantly management company, call the office in the Society for the Protection of consumer rights, etc. Diamond Comic Distributors insists that this is the case. In other words, show that the client you are unyielding, knowing their rights and give them a merry life, too. Usually after that microcracks are overgrown, the oxides dissolve, new firmware and device are somehow begins work. Rights and responsibilities. In order to protect their rights and fulfill other people's responsibilities is desirable to take a closer look with the pamphlet "The Law of the Russian Federation on February 7, 1992 N 2300-I On Protection of Consumer Rights (as amended on June 2 1993, 9 January 1996, December 17, 1999, December 30, 2001, 22 August, 2 November, 21 December 2004, July 27, October 16, November 25, 2006) "In accordance with the this law, we have plenty of rights: Clause 1 of Article 18: "A consumer who sell goods of inadequate quality, if it has been agreed upon by the seller, may opt to require: – free elimination of product defects or reimbursement for their correction by the consumer or a third person – a proportionate reduction of the purchase price; – Replacement of the goods of the same brand (model, type) – replacement for the same product of another brand (model, type) with an appropriate recalculation of the purchase price.