How to replace flyback acer 14' 11d

If your HP z74 CRT monitor is not turning on, there could be several potential causes. Some common causes of power failure in CRT monitors include:

• A faulty power supply: The power supply is responsible for providing power to all the components of the monitor, so if it is not functioning properly, the monitor will not turn on. You can test the power supply by using a multimeter to measure the voltage at the output connectors. If the voltage is not within the expected range, the power supply may need to be replaced.
• A faulty flyback transformer: The flyback transformer is a critical component of a CRT monitor, as it converts the high voltage AC input from the power supply into the low voltage DC output required by the other components of the monitor. If the flyback transformer is faulty, the monitor will not turn on. You can test the flyback transformer by using a multimeter to measure the voltage at the output terminals. If the voltage is not within the expected range, the flyback transformer may need to be replaced.
• A faulty or blown fuse: The fuse is a safety device that protects the monitor from damage due to excessive current. If the fuse is blown, the monitor will not turn on. You can test the fuse by using a multimeter to measure the resistance across the fuse. If the resistance is very high or infinite, the fuse is blown and will need to be replaced.

To diagnose the specific cause of the power failure on your HP z74 CRT monitor, you may need to open the monitor and perform some basic tests using a multimeter. This will help you identify the specific problem and take the appropriate steps to fix it. It is important to note that working on electronic equipment can be dangerous, so if you are not familiar with electronics repair, it is best to seek the assistance of a qualified professional.

the "flyback" is the VERY high voltage transformer that powers the CRT through a cable that plugs into the CRT inside the monitor case. Don't try unplugging, even with power off, as it has to be discharged to ground to remove risidual voltage, like a capasitor. This voltage is about 35,000 vdc.

check the ABL line starting at the flyback pin. Check if loss contact, resistors are open, defective diode then replace it. If it doesnt solve, try to replace ceramic capacitor at crt board

replace flyback transformer ... 100% guarantee again your monitor works normally to adjust knobs of new flyback click this link http://www.fixya.com/support/t10292274-39_m_trying_fix_21_inch_jvc_tv_its

With a piece of wood or plastic hit the flyback with the monitor turned on. If you note some change in the noise. Replace the flyback.
Normally, it is the cause of the noise.

Warning: High Voltage!! Do at your own risk!!!!!!

Best regards,

check if crt screen voltage correct (g2) try to adjust screen settings at flyback transformer and monitor if g2 response, some model if vertical ckt down monitor have black signal only can determine if screen adjustment knob in flyback transformer turn increase. vertical line appear.

replace flyback and yoke<br /><br />

the controls for focus adjustment are on the flyback transformer, (that big black thing on the left hand side (usually) of the monitor with the thick red wire that goes to the CRT.) the flyback may have 1,2,3 or even 4 knobs on it. 3 of these would be labled SCREEN (bottom knob of flyback. handles brightness)
FOCUS 1 + FOCUS 2 (focus adjustments. these are what you need to play with) and the 4th knob (some old mitsubishi workstation monitors had these) i do not know, it wasnt labled and HV adjustment was on the deflection board

disconnect the flyback transformer B+ POINT. if the tick sound goes the problem may be in the flyback transformer. replace the transformer.

Typical failure is High voltage supply. Can you hear a high pitch whine or the relay click on and off? You will need some test point reffence voltages for the board and confirm you do not have a damaged VGA cable. It is not easy to give step by step via forum. Google "monitor repair", there were a couple good general guides that are printable. If youe high voltage tranformer (flyback) is gone, do not go any further. Price of a monitor flyback is $65 to over $100 depending on model.