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Sony-SX703USB-SD, нет подсветки дисплея.

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Плата TV:
chassis: DA700V5.6.PCB 2012-02-27
EeProm: T24C16A
SPI Flash: F10-100GIP
УНЧ: A6019A
Tuner: 603PNF22-D1(5V)
LED Driver: VS4103
Матрица: H-H070L-09A

Плата USB:
chassis: DA700SD6.1.PCB 2011-08-10
SPI Flash: T80-75HCP
SDRAM: M12L64164A

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Принесли в ремонт с диагнозом нет подсветки дисплея. Замерил напряжения, вроде все в норме, но секунд через 5, стало плавать 3.3 вольта.
Нашел стабилизатор на 3.3 вольта U1 в корпусе SOT23, на нем маркировка 662K.
Поставил другой стабилизатор в корпусе SOT223 на 3.3 вольта и все ок.

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