Компьютер включается, но нет изображения на мониторе, кулеры работают, не работает спикер(пищит) HD

Ремонтируем одну из возможных неисправностей ПК. Компьютер включается, все кулеры крутятся, светодиоды и индикаторы светятся,не работает спикер и отсутствует изображение на мониторе. ************************************************************************************************************************************ Repairing one possible computer failures. The computer is turned on, all the coolers cool, light-emitting diodes and LEDs are lit, the speaker is not working and there is no image on the monitor. The problem turned out to be spoiled in the slot of RAM, but not the fact) If you have a speaker beeps, vnematelno need to listen to what he says and find rozshifrovku online. If it does not work, then you are at) as it is desirable to pay attention to how to run your video card. If you run it cooler works at the maximum, it makes a lot of noise and within 30 sikundu does not reduce the speed, so watch the video in full, in all its detail. And so obovsem order. The problem manifested itself in the past as soon as stretched video karta.Podozreniya fell on the motherboard, there were suspicions that it may be a micro-crack due to which the PC is working with zboem. And so, to begin with, our check power supply. - We get it from the system unit, disassemble, clean, look if there is swollen cans, if there is clearly a problem in that, if all goes well set back. Connect the power of the motherboard, We take a voltmeter and measure the output voltage of the power supply as shown in the video. . The output voltage of power supply will be measured on the wire pairs. The reference voltage for the black and pink wire is - 3.3V, black and red - 5V, black and yellow - 12V. The deviation of these values ​​of ± 5%. Thus, voltage: 3.3V should be in the range of 3.14 - 3,47V; 5V should be between 4.75 - 5,25V; 12B should be between 11,4 - 12,6V. The power supply is checked all right, he is a worker. Note! It happens that the cooler on the power supply does not work or does not work korektno such as spinning or spinning slowly with jerks, this indicates that the power supply is probably faulty. - Check the motherboard. To start tsoedenyaem all equipment connected to the board, and turn on the power (located on the power supply, the system unit rear) Most often on the boards lit LED power indicator and a network card. If there are indicators and are lit, well, if there is no move on. just need to check the northbridge and southbridge on the motherboard, ones need to warm up. in order to check that the north bridge we must stand memory and processor board, as well as the power is connected. startup Northbridge which is in the vicinity of the CPU in potizonku becomes warm for a minute. The South Bridge is responsible for the connected equipment such as a keyboard, etc. just for a minute to warm should not much, in the normal state at the start of both bridges will be warm. If the heat very rapidly, says the problem. ! Take out the memory, all th