I had the same issue twice (2 diffrent devices) on LG Blue-ray HX-906 - stuck on "please wait" after switching it on. It turned out to be defective mainboard - main BGA chip (the one with black radiator) has some problem with connection to mainboard. Here is how to repair it:
- dismount the mainboard
- take off the radiator from the main chip
- put alluminium foil around the chip to avoid unnecessary heating up of other parts of PCB
- heat up the chip using air hotgun to about 200 celsius for about 5 minutes.
Mount everything in reverse order and enjoy
Hello. Just tried (5.02.2021) this heating and it really works. Most heating went under black "radiator" and just in case heated little everything. Just tried and no "please wait" anymore. THAKN YOU!
My unit is LG HX906PA or HB609PA
Comigo tamb?m resultou. Obrigado pela partilha amigo.
Problema resolvido com a solu??o apresentada de reflow no chip BGA - Muito grato!
Fiz exatamente este procedimento e deu cert?ssimo! Observa??o: para retirar o dissipador tem que soltar a placa toda e descomprimir as garras de pl?stico dos fixadores do dissipador que ficam no lado oposto. Usei fita amarela de alta temperatura para proteger os componentes ao redor. Soprador no fluxo m?ximo e em 200°C por 5 minutos com a boca de 1cm e dist?ncia de 5 a 10 mm, passeando pela superf?cie do CI.
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